4140 heat treat properties

4140 heat treat properties 4C, 0. Material Notes: Post oil quenched hardness: 55 HRC surface, 55 HRC 1/2 radius, 50 HRC center. The first step in the quench-and-temper is to heat the parts to a uniform temperature above the transformation range, usually about 1650º F. 250" to 6. Alloy 4140 (AISI 4140) offers a very good balance of strength, toughness and wear resistance. # Allow piece to soak 1 hour/inch of section thickness. Shiny surface. 41L40 steel has high strength, high hardenability, high ductility, high wear resistance, good toughness, and resists stress and creep at prolonged high temperatures. 75-1. 4140 annealed is supplied in the soft condition and can be hardened to RC 40. 4140 is supposed to be an oil hardening steel. Maraging material is supplied in the annealed and descaled condition. 519 J/g-°C: 0. Gage section size = 5. 4140 HT has a medium hardness of 28/32 HRC. t. For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is SAE-AISI 4340 steel. ThermTech Offers Spin Flame Hardening for Components up to 2,500 Lbs. In comparison to carbon steel, alloys have the following improved properties: strength, hardness, and wear resistance. 4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000 Mpa (condition T). Usually supplied hardened and tempered to condition T in sections up to 100mm with a tensile strength of 850 - 1000MPa and aiming for this strength range in larger sections. 4140 Normalising: Heat to 870°C-900°C Cool in still air 4140 Stress Relieving: Annealed: Heat to 600°C - 650°C Hardened: Heat to 500°C - 550°C 4140 Kromite® #3 HRHT (4140/4150 Mod) High Strength, Prehard Alloy. Sub-Critical Annealing is a relatively low temperature heat treating process used to reduce hardness and increase ductility. Alibaba. 113 BTU/lb-°F @Temperature 150 – 200 °C @Temperature 302 – 392 °F: 0. 4140ANN has 0. 44% Manganese 0. aisi /sae 4140 (uns g 41400) chromium-molybdenum steel. % in 2 Steel alloy 41L40 is free-machining chromium-molybdenum steel with a lead addition, which makes it easy to machine, but also results in lower impact strength than other steel alloys. ALLOY STEEL 12 AND 20 FEET ROUNDS: From . 4140ANN is an oversized material, Flats + . Widely used across numerous industries, 4140 stands along as one of the most versatile metals on the market. You do not mention whether the 4140 is heat treated or annealed, but that just effects how fast your cutting speed can be and if it is HT, it would generate more heat than annealed. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. 4340 Steel Heat Treatment. 20% molybdenum alloying elements. High cycle fatigue behavior of gas-carburized medium carbon Cr-Mo steel From the preceding results, reheat-quenched 4140 steel is adequate for certain components that require deep case depth since wear properties of 4140 steel are A standard medium carbon, CrMo low alloy AISI 4140 steel has been used in the study and the chemical composition of the steel was given in Table 1. Contains slightly higher content of nickel and manganese for more machinability and wear resistance compared to standard 4140 alloys. Scope ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing. 4140 TGP material 4140 Quenched & Tempered Turned Ground & Polished 4140 Q&T is a steel in the family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). 41xx steel is a family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). 8 6. Progress of case depth with the process Heat treatment of 440c stainless steel. 375” to 12. 62 mm long (0. 8620. 035 0. To minimize distortion, parts may be removed at 400°F then air cooled. We also supply 41L40 in hex bar form. 9 mm diameter bar and smaller, ASTM A193, Grade B7 applies. Alloy is a heat treatable steel containing one or more alloying elements other than carbon. In this study, the effect of heat treatment (annealing, normalising, hardening, and tempering) on the microstructure and some selected mechanical properties of NST 37-2 steel were studied. A wide variety of sae 4140 steel properties options are available to you, such as type. 15Mo wt. 4140/4142 Heat Treated. values) Condition Tensile Strength MPa Yield Strength MPa Elongation % Cold drawn 520-850 410-670 10-12 Turned & Polished 500-630 250-350 20 HEAT TREATMENT Carburize Not Recommended Harden 850-880oC Water quench. The chromium imparts good hardness penetration while molybdenum provides hardness uniformity and strength. 035 on thickness + 1/16" up to 1/8" on width. Figure 9: 4140 chromium-molybdenum alloy steel bar, monotonic and cyclic true stress-strain curves. If you need to meet specific physical properties for your application, please contact an Alro Sales Representative to make sure this material will meet your needs. HEAT NormalizeTREATMENT 840-880 o C. AISI 4140 steel is a low alloy steel containing chromium, molybdenum, and manganese. The photo was taken when it was Chemical Composition The following composition properties are ASTM specifications for A829 GR 4140. Typical hardness is Rockwell “C” 28/34. 2) Fully hardened 4140 ranges from 54 to 59 HRC. General purpose alloy, normally (. com T H • r i a l H • Grain Size and Its Influence on Materials Properties 20 August 2005 – IndustrialHeating. Tempering Heat carefully to a suitable temperature selected by Sec. all this rambling and i still say . 4140 ASTM A193 Grade B7 Alloy – Similar to 4140 alloy, but it’s already quenched, tempered, and stress relieved. Amongst the methods used hardened PROPERTIES (Ave. Tabuso Department of Mining, Metallurgical and Materials Engineering University of the Philippines, Diliman aldrin3tabuso@gmail. 35% Chromium 0. green hra. Forging 4140 is an alloy steel that is supplied in either the annealed or prehardened condition. High mechanical properties. 4140 HT is the most commonly used high tensile steel with endless applications including everything from gears and pumps to various applications in the automotive and construction industry. M1030 is used as an alternative then pre and post heat would normally still need to be used, particularly in heavier sections. carbon content mandates the use of carefully controlled pre and post weld heat treatment. treated condition will affect the mechanical properties and a post weld heat treatment may be needed. d. 4140 resists creep in temperatures up to 1000° F and maintains its properties even after long exposure at these relatively high working temperatures. Chemical Precision ground shafting 4140 is available in both imperial and metric sizes; Typical Applications: All forms of close tolerance shafting: camshafts, drive shafts, mill shafts, motor shafts, pump shafts, bolts, pins, studs, etc; Mechanical Properties: For 215/16" or 74. This chromium and molybdenum based alloy is electric furnace melt, vacuum degassed, stress relieved, and machine straightened. The following heat treatment parameters should be used to harden the steel. (4340 heat treat) Normalizing: Heat to 845 to 900 °C (1550 to 1650 °F) and hold for a period of time, which depends on the thickness of the section; air cooling. The cold finished 4140 alloy steel bars are calcium treated; this addition greatly increases cutting speeds and tool life without sacrificing mechanical properties. Maraging is double vacuum melted by VIM (Vacuum Induction Melt) followed by VAR (Vacuum Arc Remelt). AISI 4140 steel bar is widely used as tool steel in industrial applications. no forging when below 850 ºC . Heat treatment is a process designed to alter the properties of the metal to better suit its intended use. James Henning Types of Heat Treatment and Their Effect on Metal Properties The properties of steel or other ferrous metals are mainly altered by heating the metals. A general purpose alloy, has good strength, toughness and hardness. 15-0. Heat Treatable. Quench-and-tempering or heat treating requirements for 1045, 4140, and 4340 plate usually call out a hardness range, but it is not uncommon for an application to require certain mechanical properties beyond hardness. The original patent for StressProof® — both the steel product and method of manufacture — was based on cold drawing with heavy drafts. Depending on the level of heat treating, 4140 can range from about 60,000 PSI to (roughly) 90,000 PSI at 25 Rockwell and up to 190,000 PSI at/around Rockwell 50. Temper as soon as the tools reach room temperature. Not a favorite for most bladesmiths, but the steel does fine (yawn) if it is heat treated properly. 8 8. more information. They have a very high 98% of their average alloy composition in common. The purpose of this lab is to show the processes that material science engineers (and many other types of engineers) use in implementing and creating a design. We Provide Flame Hardening on a Wide Range of Materials, but the Most Common are: 4140, 4150, 1045, 1060 & Ductile Cast Iron. Also, heat treating involves materials handling, extra parts in process, cleaning, straightening and grinding - all problems that can be avoided when you don’t have to heat treat to obtain desired strength. AISI 4140 is a chromium-molybdenum alloy steel. It is a nickel-chromium-molybdenum medium carbon alloy steel with deep hardenability. Atlas 4140 Lower cost and better availability in a range of sizes. 4140 HT is supplied in many forms such as hot rolled or turned information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. Normal ranges of mechanical properties corresponding to a specific hardness are listed below. 55 mm (3. In fact when forgings are normalized before, say, carburizing or hardening and tempering, the upper range of normalizing temperatures is used. When compared with standard 4140 heat treated to Properties The physical properties of 4140 HT steel greatly depend on the Heat Treating or Tempering processes that have been done to the material. The physical properties of 4140 HT steel greatly depend on the Heat Treating or Tempering processes that have been done to the material. If you need to meet specific physical properties for your application, please contact an Alro Sales Representative to make sure this material will meet your needs. 4140 Alloy Steel Round responds well to heat-treatment and is relatively easy to machine in the annealed condition. 5)Tempering For many years, AlSI 4140 has been heat treated to form a martensitic structure. How to heat treat 4340 steel and 4140 Comparing 4140, 4340, and 5140 alloys Comparing use and effectiveness for steel alloys Heat-treat response restricted Micro-alloyed steels H. 36-0. I. Temper as soon as the tools reach room temperature. . 4140 is now available with improved machinability, which greatly increases feeds and/or speeds, while also extending tool life without adversley affecting mechanical properties. It is offered in the hot roll, heat treated condition. Heat Treatment of AISI4140. The purpose of the molybdenum is to add uniformity of hardness and strength to this alloy. Hardening AISI 4140 bars are hardened by heating to 845°C followed by quenching in oil. 000 tolerance). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar). Not many grades can match the versatility and usefulness of 4140. Normalising The present work is the effort in improving the mechanical properties of AISI 4140 steel by hardening treatment using different quenchants such as tap water, salt water (brine solution), ice water AISI 4140 low alloy steel containing Chromium and Molybdenum is the most widely used alloy for oil patch applications. This particular alloy is generally considered to have the best weldability of this stainless class. It is widely used across numerous industries and is an excellent material choice due to its toughness, high fatigue strength, and abrasion and impact resistance. You have 15 different application for 4140 steel here. 375” to 1. In this laboratory module we will demonstrate the essential steps involved in the heat treatment of a medium carbon AISI1 4140 steel (0. Ferrous metals are annealed by heating to just above the A3 point (a point above non-magnetic that varies with the carbon content), and then cooling slowly. 8Cr, 0. Rounds It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment. 4140 is an alloy steel that is supplied in either the annealed or prehardened condition. Because of its high toughness and very good stability in heat treatment, H13 is also used in a variety of cold work tooling applications. You find 4140HW in a variety of bar and tubing applications in quenched and tempered conditions. 80-1. 4140 annealed is designated as 4140 Ann or simply 4140. The properties were compared after subject the specimen to annealing, normalizing, hardening and tempering. Typical tensile strength 156,000 PSI. 4140 General purpose pipe manufactured to ASTM Specification 519 Available in mechanical tube dimensions of 69. Heat Treatment This alloy is hardened by heating to 1550 F and quenching in oil. 4140 hot rolled steel has many applications, including drill collars, chain pins, bolts and sprockets. What is SAE 4140 Steel? SAE 4140 steel is a low-alloy steel containing chromium and molybdenum as strengthening agents. Herring | 630. Heat treatment is a process that controls the heating and cooling of a material, which is performed to obtain the required structural properties of metals. FORGING 4140 may be forged at 2200 F down to 1700 F. A wide range of mechanical properties can be obtained by tempering between 400° and 1300° F. AISI/SAE 4130 and 4140 specifications refer to a chemical composition range only, as opposed to both a chemical composition and mechanical property ranges. I am assuming that when you say heat treated 4140 you are referring to 4140 pre hardened. 4140 Annealing: Heat to 830°C-850°C. 7 : 100 more : Specific Heat (J/kg-K) 473 : 150-200 more The physical properties of 4140 Q&T greatly depend on the Heat Treating/Tempering processes that have been done to the material. Hardening steels involves the basic process of heating the steel to organize the crystalline structure in a uniform way and then rapidly cooling it by quenching it to lock the molecular make-up of the steel. Commonly available 4140 pre hardened is around Rockwell C 28-30 and intended to be machined fairly easily as is. 4140 HT is a medium carbon alloy steel heat treated to a . PROPERTIES (Ave. 40% Carbon with Chromium and Molybdenum as the primary hardening elements. 4140 PH, say 4" OD, with diameters turned down to 1. A519 4140 tube American Piping Products stocks A519-4140 tube in the following grades: L80 and P110 heat treated mechanicals. With an on-site 8′ x 8′ x 14′ car-bottom furnace, Precision Grinding anneals parts cut from 4140 every week. This steel is offered in a wide range of conditions including but not limited to: cold drawn annealed, hot roll heat treated, heat treated turned ground and polished. Specific Heat Capacity: 0. 38-0. AISI 4140 is high strength medium carbon steel. A special analysis of alloy steel which is heat treated by oil-quenching and tempering to develop a balance of mechanical properties. 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. mechanical properties – heat treated and stress relieved. Tighter Tolerance than Cold Drawn. 440c stainless steel is martensitic, which implies that it is hardenable by heat treatment. Fair to poor weldability. It also contains the use of SAE 4140,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Forged of AISI 4140 Oil and Gas industry Steel material metal Forged AISI 4140 steel at 1150-1200 ºC. Heat Treatment AISI 4140 alloy steel is heated at 845°C (1550°F) followed by quenching in oil. 124 BTU/lb-°F @Temperature 350 – 400 °C @Temperature 662 – 752 °F: 0. Higher core hardness typically means a more uniform hardness through any cross section. 75Mn, 0. The objective of the present work is to corroborate microstructure and mechanical properties by varying the intercritical temperature in duplex steels. Heat Treatment This alloy is hardened by heating to 1550 F and quenching in oil. 035 on thickness + 1/16" up to 1/8" on width. Has every requisite for brake die service-high wear-resistance, adequate AISI 4140 alloy steel can be welded using all conventional techniques. Mechanical Properties & Hardness. nominal hardness of 28-32 HRC. AISI 4140/41L40 - Annealed This medium carbon alloy grade is widely used for many general purpose parts requiring high tensile strength and toughness. F), 1 h, water quenched. 43 0. 00% Phosphorus max 0. It is offered in the hot roll, heat treated condition. . 134 BTU/lb-°F @Temperature 550 – 600 °C @Temperature 1020 – 1110 °F: Thermal Conductivity: 33. The characteristics of tempered martensite have been favorable when it comes to high demanding applications. Cool slowly in ashes or sand etc. 4140 Annealed Alloy Steel 4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000 Mpa (condition T). FLEXOR®'s consistent quality and versatility in heat treatment allows for a wide range of physical properties that are more appealing than those of typical ASTM, AISI or SAE 4140 alloy steel. Tighter Tolerance than Cold Drawn. 25% It has relatively high machinability when heat treated. If you want the part carburized to your spec, then the suggestion of 8620 by arunmrao is a good one. It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment. . Our e. The alloy is very tough, relatively AISI 4145 steel is usually supplied ready heat treated to 30-36HRc. 750”. ) have enough carbon content to harden without addition of carbon to the surface (case hardening). Product hardness-typically 200 Brinell. The chromium imparts good hardness penetration while molybdenum provides hardness uniformity and strength. If further heat treatment is required annealed AISI 4145 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. 500”. 020 up to . S. Performed prior or after machining to minimize distortion in heat treating 1100/1200oF, hold two hours then air cool to room temperature Hardening Oil quenching required. 0 W/m-K: 229 BTU-in/hr treated condition will affect the mechanical properties and a post weld heat treatment may be needed. then cooling in furnace to 480 ºC , then cool in air. Datasheet for Steel Grades Carbon Steel ASTM 4140 ASTM 4140 Standard Heat Treatment Stress Relief # Heat 4140 PH sl owly and uniformly to 900/F. 4140 Alloy Steel Round, is an cold drawn annealed steel of relatively high hardenability with its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. 4140 HT can also be surface hardened to increase wear resistance . 02 less carbon than 4140/42PH. E. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. 001 inches on a dimension (diameter, length, etc. AISI 4140 Steel, oil quenched, 540°C (1000°F) temper, 25 mm (1 in. They are generally in the range 0f 26-32 HRc. If you need to meet specific physical properties for your application, please contact an Alro Sales Representative to make sure this material will meet your needs. Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings AISI/SAE 4340 Alloy Steel, 4340, is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. 15-0. Yet, with such an advantage, heat-treating steel might show some disadvantages Maraging is a 18% nickel, cobalt strengthened steel (C-type) with excellent properties, workability and heat treatment characteristics. %), and measure macroscopic mechanical properties of the materials after different heat treat-ments, noting trends and correlations in the resulting mechanical behaviors. Annelling always help, but you mentioned 900F, which is about 480 degC. 3017 | dherring@heat-treat-doctor. Heat Treatment AISI 4140 alloy steel is heated at 845°C (1550°F) followed by quenching in oil. 1-Day Shipping We likely have the ASTM A519 Grade 4140 / 42 carbon steel alloy mechanical tubing in the sizes and specifications you're looking for. 4140 HT is supplied in many forms such as hot rolled or turned, ground and polished rounds and DCF plate to be used as a holder material for Keywords: Distortion; quenching; heat treatment simulation; C-ring; 4140 steel; martensite; microstructure; hardness. KROMITE® #3 – [4140/4150 (modified) Hot Roll, Heat Treated, High Strength Alloy] It is offered in the hot roll, heat treated condition. 8620 is the most widely used carborizing alloy ; Its nickel content imparts good toughness and ductility Table 1 Material properties DH, m, and B of the Avrami approach determined for different heat treatment conditions of the shot-peened steel AISI 4140 Heat treatment Measuring property DH, eV m B, min1 . It is also relatively easy to heat treat due to its austenitizing requriements being similar to other low alloy steels with the benefit of being easy to quench for full 4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - usually provided hardened and tempered in the tensile range of 850 - 1000 Mpa (condition). 15-0. 53 mm (0. e. 4140 Steel Composition To the OP: 4140HT (Heat treated) and 4140 QT (Quenched and tempered) and 4140 HTSR (Heat treated & stress relieved) and 4140 Pre-Hard are all basically the same thing. Fig. As far as heat buildup in the workpiece, the answer is coolant in a fairly large stream. It has a tensile strength of 150,000 psi, yield strength of 130,000 psi and approximately 35-45% elongation. 5" - (4140 and 4340) Available in 4140 ANNEALED - 4140 HEAT TREATED - 4340 ANNEALED - 4340 HEAT TREATED CLICK HERE TO SEE ALL AVAILABLE SIZES This heat treatment results in the formation of martensite after quenching and hence an increase in strength and hardness together with a significant loss of ductility. Conforms to NACE Standard MR01-75. 030% Sulfur max 0. The aim hardness specified for the test samples was HRC 40. Alloy 4140 is widely used as an alternative to carbon steel where strength and fatigue are a concern. 040% Silicon 0. High mechanical properties. 8630 Alloy – This alloy is tough yet ductile. This heat-treated medium carbon alloy has every requisite for all around good service in applications requiring wear resistance toughness, high mechanical properties and good machinability. 113 BTU/lb-°F @Temperature 150 – 200 °C @Temperature 302 – 392 °F: 0. Supplied in the annealed or prehardened condition. 00 0. 7225 and JIS SCM440. It is manufactured by hot working and then cold finishing the steel Read more » Vacuum arc re-melted 4340 vs. Before exploring each of these processes, it is important to understand the differences between the steel plate properties that are targeted during heat treatments. Alloy 4140 is the most widely used alloy for oil patch applications. China round steel bar 4140 ht steel properties, Find details about China 4140 ht steel properties, 4140 ht properties from round steel bar 4140 ht steel properties - Qingdao Helio Steel Co. with a 45” Max OD. Temper 180-210oC air cool WELDING Readily weldable, use Bohler FOX OHV electrodes or EMK-6 for MIG or TIG welding. 4140 annealed is supplied in the soft condition and can be hardened to RC 40. Blind Horse Knives used 4140 for a time before switching to the far superior O1. 25") wall Production Tube Cutting Inc. It is low alloy steel with chromium, molybdenum, and manganese. Alloy 4145 is a through hardening grade that maintains its properties at high temperatures. 4140 annealed is supplied in the soft condition and can be hardened to RC 54. A major difference is the lower carbon content for this alloy which eliminates the need for post-weld heat treating. 25 0. Yield strengths range from 110 ksi through 140 ksi, but we can temper it to other strength levels. For this reason, it is often used as stock for forging, as 4140 has self scaling properties. 2 Austenite grains with annelaing twins in AISI See Heat Treating 4140 Hammer Dies Includes temper table. 4340 steel is a low-alloy formula featuring nickel as well as some chromium and molybdenum. AISI 4140H Steel, heat treated, tempered 540°C (1000°F), 25 mm (1 in. Premier Commercial Heat Treater for Spin Flame Hardening of Wheel & Gear Components. 020 up to . endow the heat­treated steel with distinct material properties. For spheroidizing annealing of 4140 alloy steel, it needs heat treated to 749 °C (1380 °F), followed by slowly cooling to 666 °C (1230 °F) at a rate of 6 °C (10 °F)/hour, or rapid cooling to 675 °C for isothermal annealing. High Heat (Austenitizing) 1500/1550°F for 20 to 30 minutes at heat. This process improves machinability and reduces stress, to decrease the likelihood of cracking during cold working operations. 4140 responds readily to heat treatment and is comparatively easy to machine in the heat treated condition. 41L40 can be heat treated and annealed. 473 J/g-°C: 0. Rockwell hardness is C35 max. Lab 4: Heat Treatment of Steel Due: 11/29/2017 Experiment Performed: 11/1/2017 Abstract This lab compares the properties of heat treated 4140 steels. Hardening happens between 1525-1625°F. 4140 is not difficult to machine, it just takes some technique. It also contains the use of ASTM 4140,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Through variations in the method of heat treating 4140, an exceptionally wide range of properties can be attained. Hardening happens between 1525-1625°F. The 4140ANN that Windsor Steel Corporation has in stock is an annealed materials versus the 4140/42PH which is a pre-heat treated material. If further heat treatment is required annealed AISI 4145 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. its a new one on me. 5" here and there will in no way be the same properties as 4140A properly roughed out near net size and THEN heat treated Bobw , Davis In SC , thermite , randyc , Mtndew liked this post 4140 is not used for carburizing, but it can be surface hardened using induction. Introduction Heat treatment is used to improve some of the mechanical properties of steel components, and commonly involves a quenching step which may cause undesired geometrical distortions in the processed parts. Annealing is frequently used to soften metals including iron, steel, copper, brass and silver. One of the questions all Heat Treaters are asked is, “How much, if at all, will my part change (i. For 4140 steel, the recommended heat treatment consists of heating to austenitizing temperature, typically 1570°F (855°C), followed by oil quenching. 3 in. Atlas 6582 Superior impact properties and through-hardening when heat-treated to similar strength levels as 4340. 41L40 THE HEAT TREAT DOCTOR Daniel H. 15/-. Through variations in the method of heat treating 4140, an exceptionally wide range of properties can be attained. Fig. 4140 Alloy Steel Technical Data. 4140 hra & htsr. com Abstract Steel is an iron alloy which comes in different compositions and with different properties to properly suit its intended use. 4140 Hot Rolled Heat Treated Round Bar. A829-4140 Carbon 0. Then tempering was performed at about ~ 550 C during 1 hour. 561 J/g-°C: 0. Table 1 compares chemistry of both MIM made 4605 and 4140. 4140 is composed of chromium, molybdenum, and manganese. In these applications, H13 provides better hardenability (through hardening in large section thicknesses) and better wear resistance than common alloy steels such as 4140. C (1830 deg. 8 10. PACIFIC 4340 is available in two conditions: heat treated (quenched and tempered) to high strength or annealed for ease of machining and subsequent heat treatment. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed. The following are guidelines for the heat treatment of FLEXOR®. 2 in. 4140 responds readily to heat treatment and is relatively easy to machine in the heat treated condition. 20%)molybdenum; Properties: good hardness penetration, strength, toughness, and ductility ; Rockwell 28/32C type. 4140 HT is supplied in many forms such as hot rolled or turned, ground and polished rounds and DCF plate to be used as a holder material for high strength structural components. Our 4140 annealed hex bars are available in various sizes and can be cut to your exact specifications. Heat Treatment. Certification AISI 4140 alloy steel is available with a cast and analysis certificate or a BS EN 10204 3. Usually supplied in the hardened and tempered condition at 22 HRC max. Cool in furnace. AISI 4145 steel is usually supplied ready heat treated to 30-36HRc. phases on the ultrasonic properties were studied on AISI/SAE 1040 and 4140 steels. Austenitize and Air­Cool: This is the typical heat­treatment given to the steel by the manufacturer, and is accordingly termed the as­received condition. However, in general slightly lower impact properties achieved when heat-treated to similar strength levels as 4340. LSS 4140 is the classic AISI 4140 alloy steel that is sold in the annealed condition at a hardness less than or equal to 217 HBW. 4140 might be a little be stronger after welding but could also be more brittle depending on the procedure used to weld it and the preheat used. Rounds AISI 4140 0. It is tough and strong as heat treated, characteristics which bode well for use in automotive applications such as axle shafts and crank shafts as well as high-performance brackets and bolts used in many industries. o It is also available only in round bars, I expect that compared to "4140 heat treat" his material is far less isotropic in its properties (i. 4140 alloy steel is a cold drawn steel that machines well and can be heat treated. 519 J/g-°C: 0. Tempering (reheating after quenching) will achieve the desired hardness range. 4140ANN is an oversized material, Flats + . Cool in furnace. It has a typical hardness of 269/341 BHN and a typical tensile strength of 156,000 PSI. 4140 annealed is supplied in the soft condition and can be hardened to RC 54. In stock and ready to ship. Based on the composition and mechanical properties that 4140 steel possesses, a wide range of applications in industry can be found. It is widely be used in the industry due to its excellent versatility and RE: Growth of 4140 during Heat Treat to Rc 45 TVP (Materials) 14 May 12 15:51 You will definitely need to machine after HT if you need to maintain a tolerance of ± 0. Harde ning For this reason, it is often used as stock for forging, as 4140 has self scaling properties. Some common heat­treatments for low and medium carbon steels: 1. Medium to high carbon steel parts (1045, 1137, 1141 1144, 4140, 8640, etc. If you want the part induction Dear Sir, My query is about qualifying a procedure for the combination, EN19 (AISI 4140) to Weldox (S690QL) As you’ve stated in this article, qualifying 4140 in annealed condition is easier and S690QL properties will deteriorate on PWHT, What would be the heat treatment condition for the both materials then prior to qualifiaction to avoid PWHT LSS™ 4140 and 4142HT Alloy Steels. AISI 4140 Steel Characteristics. F), 1 h, oil quenched, tempered 649 deg. With its moderately simple composition, strength and toughness, 4140 steel bar is used in a variety of machined applications such as gears, bolts and fasteners. Quench Quench in oil to 150°F . 41xx steel is a family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). 4140 Further increase in strength required, plus guaranteed tensile properties are a requirement. Machinability of this alloy is good in the annealed condition. AISI 4140 is a chromium-molybdenum steel that can be heat treated to higher strength levels or in thicker sections than AISI 4130. 5 inches, has any changes in cross-section, and deviates at all from a simple shape (small shaft, sphere). 10% Molybdenum 0. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed. 4140 Steel properties and heat treat as below. The prehardened condition is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Hardened Material: Heat to 50F below tempering temperature, (1000/1100F if tempering temperature not known). 4140 is a widely used medium carbon steel. 4140 resists creep in temperatures up to 1000° F and maintains its properties even after long exposure at these relatively high working temperatures. Air cool. its properties would depend on the direction in which the metal is loaded) Niagara LaSalle has done quite a bit with their cold drawing technology but its limitations need to be understood. Typical Properties AISI 4140 and 4150 is a medium carbon, chromium-molybdenum alloy steel. 4140ANN has 0. Welding of grade 4140 would not normally be Hi, as those 41XX and 43XX alloys are pretty good for heat treating, you better be aware of somethings: You are surelly inducing a higher strengh by welding process, locally quenching the material. Annealing is the softening of metal by heat treatment. 0 W/m-K: 229 BTU-in/hr Choose from over 550 grade 4140/4142 steel products in a wide range of sizes. Alloy AISI/SAE 4140/ 4142 (UNS G 41400/G 41442) Mechanical Properties Heat treated to HRC 22 maximum for sour gas service. HEAT TREATING: 4140 has a hardening range of 1525° - 1625° F. Higher core strength required. FORGING 4140 may be forged at 2200 F down to 1700 F. 4140 TGP material 4140 Quenched & Tempered Turned Ground & Polished 4140 Q&T is a steel in the family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). AISI 4140 steel grade is a versatile steel grade. In comparison to carbon steel, alloys have the following improved properties: strength, hardness, and wear resistance. Fair to poor weldability. 15-0. These give great corrosion resistance and strength up to around 600°. 4140 steel is annealed at 872°C which is equivalent to 1600°F. usually 4130 is heat treated only as a stress relief treatment and not to make it stronger. 4140 HT Alloy TG&P Shafting. These characteristics include high strength and good machinability that can easily be heat treated for increased hardness. The nominal normalizing temperature for 4140 grade is 1600 º F (870 º C), but production experience may necessitate a temperature either 50 º F (10 º C) above or below this figure. # Cool slowly (50/F/hr) to 1200/F, then air cool. 4140 steel bar responds well to heat treatment, is relatively easy to machine in the annealed condition, and is used in a wide variety of machined parts. After heat treatment; 4340 steel has great machinability, heat treatment stability and impact toughness. Raw Mateial: SAE 4140 Forging Temperature:~ 950-1000 C 1st question: What must be the hardnees value as forged in air cooled condition? For the heat treatment, First, the part was austenized at about ~880 C during 40 minutes and quenched in 90 C oil bath. The following specifications are generally applicable for 4140/42 Heat Treated Rounds: ASTM A 193, Grade B7; ASTM A 434, Grades BC and BD. Machining AISI 4140 has good to very good machinability, dependent on condition, and operations such as sawing, turning, broaching, milling etc can be accomplished satisfactorily using standard machine tool manufacturers recommended speeds and feeds. can provide competitive tube cutting, tube bending, tube machining, custom tube fabrication and tube pre-assembly services for your carbon alloy steel tube requirements, including seamless alloy steel tube, with industry codes, industry specifications (grade, class, ASTM, AMS, MIL), tube properties (material grade & temper, tensile KSI, yield KSI, elong. # Air or furnace cool to room temperature. 9 High Quality ASTM A193 B7 Galvanized Stud Bolt, ASTM A193 B7 B16 L7 Threaded Rod Stud Bolt and A194 Gr 2h Hex Nut and so on. It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment Read Free 4140 Heat Treatment Guide discussion - Eng-Tips 4340 Heat Treating - Material engineering general SUBJECT GUIDE 1 Heat Treating Overview Heat treating, as the name implies, is a series of treatments in which heat is used to alter the properties of a metal or alloy. The process is one of the simplest that can be employed on cast products to homogenize grain structure, improve machinability and generate better response to subsequent heat-treating processes. Steel aluminum alloys astm e8 mechanical properties of 4140 steel evocd yield strength hardelity of steel in the loupe Mechanical Properties Of 4140 Steel EvocdPractical Hinist Largest Manufacturing Technology Forum On TheTensile And Hardness Test Results TableMechanical Properties Of 4140 Steel EvocdTeaching Demo To Reinforce How Mechanical Properties Change Due Heat Treatment ProcessesModel See full list on azom. It is important to keep in mind that heat treatment facilities are likely to vary in their capabilities. It is typical to use a low-alloy filler metal that does not share the chemical composition of the 4130/4140 base material, but one that still provides suitable mechanical properties for both the as-welded and post-weld heat treated (PWHT) conditions. 4140 4140 / 42CrMo4 /1. com Heat Treatments 4140 Forging: Heat to 1150°C Hold until uniform. Alloy > 4140 This medium carbon alloy steel grade is widely used for many applications requiring high tensile strength and ductility combined with hardness in the R/C 40 range. 4140ANN has 0. Heat Treat Condition 28/32c. This treatment should be performed on higher carbon material grades such as 1045 or 4140. The steel should be austenitized at 1500 to 1550 º F (815 to 845 º C), the actual temperature being a function of chemical composition within the allowed range, section size T6 Solution heat treated and then artificially aged: Applies to products that are not cold worked after solution heat treatment, or in which the effect of cold work in flattening or straightening may not be recognized in mechanical property limits T7 Solution heat treated and stabilized: Applies to products that are stabilized after normalizing heat treatment for investment castings ThermTech is proud to offer normalizing heat treatment for investment castings. G Page 4 4140/42/45/50 unS G41400, G41420, G41450, G41500 41l40/42, 41l50 (leAded) chromium-Molybdenum Steel Bars and Plates color Marking 4140/42/45: Annealed Bars – Ends painted Black and Red Heat treating tool steels jis sks3 steel o1 9crwmn 95mnwcr1 heat treatment of steels an overview quenching parameters in aisi 4340 steel4340 Steel Heat Treatment Chart ToskinVariation For Hardness With Tempering Temperature 4340 Steel4340 Steel Heat Treatment Chart ToskinMechanical Properties Of Aisi 4340 Steel After Tempering For 2 H4340 Steel Hardness Chart HoskinTidewater Blacksmiths Guild Alloy is a heat treatable steel containing one or more alloying elements other than carbon. This work studies the outcome of heat treatment of AISI 4140 on wear, hardness, and tensile strength. com offers 1,641 sae 4140 steel properties products. affected if it is welded in the heat treated condition, and post weld heat treatment should be performed. ) LSS 4140 is supplied in the annealed condition and is typically heat treated prior to be placed into service. It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment. However, the mechanical properties of this steel will be affected if it is welded in the heat-treated condition, and post-weld heat treatment should be performed. Typical Chemical Composition AISI 4140 alloy steel can be welded using all conventional techniques. 4140 is currently out there with improved machinability, that greatly increases feeds or speeds, while also extending tool life while not adversely affecting mechanical properties. 4140 Hot Rolled SBQ Bar Hot rolled 4140 steel bar is a medium-carbon alloy steel that has a high hardenability. Post-weld heat treatment should be considered to achieve required properties. 4142 Heat Treated HOT ROLLED & COLD FINISHED. 4140 HT Turned, Ground & Polished Precision Shafting material is quench & tempered, stress relieved, machine straightened and turned ground & polished. Alloying elements and thermal treatments, such as quenching and tempering, greatly influence the hardness and strength of the steel. I would suspect that with such a large block of steel the temperature differential with the water pour was just to great and it cracked. 4140 hot rolled bar is a medium carbon alloy steel with good fatigue and impact resistance after heat treating. While the water pour is a traditional blacksmith heat treatment I don't believe it is a common technique for heat treatment shops. It is a general-purpose alloy used where substantial strength, toughness and hardness are required. 75") od to 508 mm (20") od / 8. I recently turned some of it just recently and it was no problem and gave a outstanding finish, far far better than 1018. 9 12. This article provide detailed introduction to the AISI 4140 materials, its properties, welding and PWHT requirements. ) round Categories: Metal ; Ferrous Metal ; Alloy Steel ; AISI 4000 Series Steel ; Low Alloy Steel ; Carbon Steel ; Medium Carbon Steel Mechanical Properties Enhanced Through Heat Treatment. Métaux Solutions 4140 Annealed is a high-quality, 4140 alloy steel intended for all mechanical uses where improved machinability, uniform hardness and excellent flatness are required. Refered to as chromoly steel, due to the inclusion of . It is a widely used medium carbon alloy steel which is relatively inexpensive considering the hardenability it offers. 134 BTU/lb-°F @Temperature 550 – 600 °C @Temperature 1020 – 1110 °F: Thermal Conductivity: 33. 4140 annealed is designated as 4140 Ann or simply 4140. And the equivalent grade for it is DIN 1. 284 lb/in³: Tensile Strength, 156000 psi: Tensile Strength, Yield: 143000 psi 4140 on the other hand, can triple in yield and tensile strength using very rudimentary heat treating techniques. Forge 850-1050 o C. Heat-treated steel has been used since 1990, due to its lower cost production cost compared to that of hot-rolled steel. 4140 Alloy Steel Data Sheet. 4140 heat treated alloy is a chromium-molybdenum, medium carbon alloy steel, and is used in a wide variety of applications requiring high strength and toughness. 1) 4140 is an OK die steel but is not recommended for radical shaped dies such as narrow fullering, crown and so on. However, different steels have different hardening steps to follow. allows steel to possess numerous desirable mechanical properties in its solid state. 4140 has a machinability rating at 66%; 4140 is difficult to weld, but this can be done if the section is preheated, and stress relieved after welding; Through variations in the method of heat-treating 4140, a wide range of useful properties can be achieved. 4140 is the most commonly used of the high tensile steels with a wide range of applications in automotive, Gear and Engine construction, Crankshafts, Steering knuckles, Connecting rods, Spindles Heat Treatment. 02 less carbon than 4140/42PH. The general goal of the heat treatment of 440c stainless steel is to limit, as much as possible, the amount of austenite in the steel and promote the creation of martensite [3]. AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. 834. 3 : 20-100 more: oil hardened, tempered 600°C : Thermal Conductivity (W/m-K) 42. It is a heat treatable alloy steel that contains nominally . Minimum forging temperature 850°C. This low alloy steel is ideal where its high fatigue strength, torsional strength, abrasion resistance, and toughness make it ideal for a number of applications. The main types of heat treatment are: Annealing; Normalising; Hardening; Tempering; Annealing. stocks this grade in both metric and standard sizes. Walls from 0. A grade of steel should be selected that will produce physical properties needed and quench out at a hardness above part requirement. LSS™ 4140 (4142) HEAT TREATING INSTRUCTIONS (See Tech-Topics Bulletin 102 for a more thorough explanation of heat treating. AISI 8630, 8735, and 8740 are nickel-chromium-molybdenum steels that are considered as alternates to AISI 4130, 4135, and 4140, respectively. Great toughness, fatigue strength, abrasion and impact resistance. It can be heat treated and hardened and offers impressive toughness, though not enough to be made into stainless steel. Anne aling # Prior to rehardening, anneal 4140 PH at 1450º -1550/F for 4 hours. By rapid cooling and isothermal heat treatments, the specimens having martensite, tempered martensite, bainite, fine pearlite stainless steel. This was followed by the highest temperature stress relieving treatment possible to obtain a combination of properties, including strength, wear resistance, minimum warpage and excellent machinability. 4140 Alloy Steel Round has good strength and wear resistance MIM 4605 with MIM 4140 at two different heat treat conditions. 4140 steel. 4140 responds readily to heat treatment and is comparatively easy to machine in the heat condition. 7225 For applications requiring high tensile strength and toughness values, in particular in small medium cross sections. Throughout several heat-treating processes the composition of this material can be altered and lead to other mechanical properties. Check for all applications for 4140 steel. 7225 Both SAE-AISI 4140 steel and SAE-AISI 4340 steel are iron alloys. Density: 0. e. OD from 2. An older BHK Bushbaby in 4140. The 22 mm diameter steel bar was received in hot rolled condition and austenitized at 1123 K, for 1 h, quenched in oil, and then tempered to a hardness of 320 Vickers Hardness scale (VHN) with ASTM austenite grain size number 9. Temper 180-210oC air cool WELDING Readily weldable, use Bohler FOX OHV electrodes or EMK-6 for MIG or TIG welding. Kromite #3 is a modified 4140/4150 steel. _____ 1. Alloy 4140 is widely used as an alternative to carbon steel where strength and fatigue are a concern. Datasheet for Steel Grades Carbon Steel SAE 4140 SAE 4140 Standard Number: information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. 1 Ferrite grain structure of a lamination steel; 2%nital etch. Quench in oil. Heat Treatment of SAE/AISI 4140 Alloy Steel 4140 Steel Annealing Slowly heat to 800~8500 ºC, keep enough time, ensure heat thoroughly. ) that is larger than ~ 0. This grade is also widely used for forging. 85 mm (2. ) round Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel. 10 0. Hold 2 hours. 95% chromium and . 4140 Heat Treated is a chromium-molybendium alloy steel. Alloy steel 4340 heat treatment including: normalizing, annealing, hardening, tempering, spheroidization, stress relief, etc. 284 lb/in³: Tensile Strength, 156000 psi: Tensile Strength, Yield: 143000 psi Steel bars within the specified composition range for SAE 4140 were obtained from two different sources, and heat treating was carried out by three different concerns. This makes it useful as stock for forging. its properties would depend on the direction in which the metal is loaded) Niagara LaSalle has done quite a bit with their cold drawing technology but its limitations need to be understood. Heating methods include normalizing, annealing, quenching, tempering, and surface hardening. shrink or grow) during heat treatment?” While the heat treater would love to be able to give a precise answer to this question, in most situations volumetric size change during heat treatment cannot be accurately predicted, at least not accurately enough to allow for final machining and/or Heat treatment provides an efficient way to manipulate the properties of the metal by controlling the rate of diffusion and the rate of cooling within the microstructure. Strength: The load a material can bear, measured by yield point and tensile strength. When specifying properties it is always best to call out the Rockwell "C" hardness as the defining requirement rather than draw temperature. By making the steel undergo heat treatment, it improves the strength of the steel which is a very desired material property during construction. 4140 Annealing & Stress Relieving With proper furnace heating techniques, AISI 4140 maintains its properties through exposure to the relatively high heating temperatures during annealing or stress relieving. 561 J/g-°C: 0. 08 mm diam x 7. Based on the feedback that you received, it sounds like your heat treater was describing the problem of 4140 and carburizing. The 4140ANN that Windsor Steel Corporation has in stock is an annealed materials versus the 4140/42PH which is a pre-heat treated material. 4140 can be easily welded with the right precautionary steps being applied. Temper as soon as the tools reach room temperature. LSS 4140 and 4142HT are versatile, alloy steels that are used in a variety of tooling and other industrial applications. AISI 1040 and 4140 steels are generally used as structural steels for varying applications, ranging from construction field material to heat resistant parts for moderate temperatures applications. Other desirable properties include good wear 4140 responds readily to heat treatment and is comparatively easy to machine in the heat treated condition. C (1200 deg. Cost, Availability, Heat Treating, Finishing, and Sharpening The biggest benefit of O1 over the years has been its availability nearly everywhere and relatively low cost. This chromium and molybdenum based alloy is electric furnace melt, vacuum degassed, stress relieved, and machine straightened. Applications In these cases, AISI/SAE 4130 and 4140 low-alloy steels are often used because their chemical composition allows them to be heat treated to high tensile strength and hardness. But it should be tempered for any heavy use. it also finds favour in many applications requiring higher strength levels up to 150 KSI 0. 4140 Chromium-Molybdenum Steel. Properties Conditions : T (°C) Treatment: Thermal Expansion (10-6 /ºC) 12. Table I shows the mechanical properties and hardness values for all six test iterations involved in the study. diam x 0. The thermal history leading to this state is also called Alloy 4140 (AISI 4140) is one of the most popular direct hardening Cr-Mo alloy steel plates that have the ability to develop an extensive range of hardness and strength. Tempering Heat carefully to a suitable temperature selected by problems that frequently add costs. The prehardened condition is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Heat treating is often used to alter the mechanical properties of a metallic alloy, manipulating properties such as the hardness, strength, toughness, ductility, and elasticity. Specific Heat Capacity: 0. 124 BTU/lb-°F @Temperature 350 – 400 °C @Temperature 662 – 752 °F: 0. AISI 4140: ASTM A-29, ASTM A-193, ASTM A-519, API 5CT, API 6A, API Spec 7-1, & API 14A GENERAL SCOPE: 4140 is a low alloy steel that is commonly used in downhole tools. And we are professional astm 4140 steel alloy supplier, stockist and exporter. AISI 4140 can be welded using all conventional techniques. Capital Steel & Wire is a leading distributor of 4140 hex bar stock in cold finished form. Minimum tempering temp 1150˚ F. Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings 4140 Alloy Steel Technical Data. 95%)chromium, (. The effect of heating the metals to a particular temperature level like the lower critical limit temperature or the higher critical temperature tends to alter various qualities of the material. How is 4140 Steel Annealed Hardened and Tampered? Before 4140 steel is ready for use, it is usually subjected through these three processes; annealing hardening and tampering. 473 J/g-°C: 0. FORGING 4140 may be forged at 2200 F down to 1700 F. l--Elevated temperature tensile properties of 4140 steel heat treated to 200 ksi (1379mPa)nominalstrength. com Fig. PACIFIC MOLY-KROME® is available in four conditions: heat treated (quenched and tempered), annealed, normalized and as rolled. Hot rolled 4140 steel also has good fatigue and impact resistance after heat treating. Axles, Nuts and Bolts. 80-1. Songshun Steel 2020-10-29T05:12:27-04:00 AISI 4140 Steel Round Bar Sheet Plate, JIS SCM440, DIN 1. Welding Nitriding #135 is a modification of 4140, and similar filler material and welding practices are satisfactory. MIM-4605 and MIM 4140 are common low alloy steels used for structural application where high strength and hardness are necessary. 4145 has better hardenability than 4140 due to its additional carbon. The hot parts are then quenched in a liquid, usually oil (for medium carbon plate or alloy plate like 1045, 4140, or 4340) or water (for low carbon alloy grades like A514). Other hardnesses can be obtained with further heat treatment. long). 4140 is relatively easy to harden. e. 4140 Hot Rolled Heat Treated Round Bar ASTM4140, Scm440, 42CrMo manufacturer / supplier in China, offering Heat Treatment 40cr 42CrMo Scm440 / 4140 Bars Quenched and Tempered, Grade 4. 4140 is commonly used for a variety of applications in the oil and gas sector. It is also available only in round bars, I expect that compared to "4140 heat treat" his material is far less isotropic in its properties (i. The overall yield strength of 1018 is around 70,000 PSI. Below you will find chemical and mechanical properties for 4140. The purpose of these processes is to enhance the physical and mechanical properties of this steel. Includes material certificates and CAD models. The most notable difference between the two materials is the use of Cr instead of Ni in the 4140. T. I think Blind Horse finished theirs up in the mid-50's Rockwell (not much good once it gets too hard). 1 mill 4140 Heat Treated Alloy Round Cold Finish | Hot Rolled 4140 heat treated alloy is a chromium-molybdenum, medium carbon alloy steel, and is used in a wide variety of applications requiring high strength and toughness. Heat Treatable. It responds well to heat treating, exhibits superb core characteristics, and has good weldability and machining properties. Others steel in this category as AISI 4130 and 4340 follow same welding advise. 02 less carbon than 4140/42PH. Heat Treatment of 1045 and 4140 Steel A. Yield point is the maximum point of Heat treating details, structural and fatigue properties of AISI 4140 steel Hardness profiles of AISI 4140 steel, ion nitrided at 748 K for 1, 3, 8 and 16 h. values) Condition Tensile Strength MPa Yield Strength MPa Elongation % Cold drawn 520-850 410-670 10-12 Turned & Polished 500-630 250-350 20 HEAT TREATMENT Carburize Not Recommended Harden 850-880oC Water quench. 015 allowance, +0. 040 Physical Properties Physical properties for AISI 4140 Steel Property Density, lb/in3 Modulus of Elasticity, psi Coefficient of Thermal Expansion, 68-212˚F, /˚F Thermal Conductivity, Btu/ft hr ˚F Specific Heat, Btu/lb ˚F Electrical Resistivity, Microhm-in AISI 4140 Data (AISI 4140 Modified) Maxel Tooling Alloy is an AISI 4140 modified chemistry alloy steel heat treated to a medium hardness (26/34 HRC) and ground to tool steel tolerances (+. Commercial and military aircraft, automotive systems, forged hydraulic and other machine tool applications, forged steel crankshafts. 4140 HT is supplied in many forms such Kromite #3 is a modified 4140/4150 steel. , Ltd. 35 0. optimum heat-treat response in heavier cross-sections. 2% PS. Density: 0. Product Description: 4140 Alloy Steel Hex Bar is noted for its toughness, good torsional strength and good fatigue strength. Heat treating is available at our Ohio location. Better impact properties are required. 4140 HT Surface Hardening . Before hardening, it can be normalized by heating at 913°C (1675°F) for a long period of time followed by air cooling. Please consult your heat treatment provider for full guidance on heat treatment of alloy steel. ® 150® meets AMS 6378 specifications. 4140 is the most commonly used of the high tensile steels with a wide range of applications in automotive, Gear and Engine construction, Crankshafts, Steering knuckles, Connecting rods, Spindles, Intermediate gears, Pump and Gear shafts. Annealed Material: Heat 1200/1250F, hold 2 hours, cool in still air. It can be through hardened in large sections. 34") wall to 82. 4140 contains chromium and molybdenum as alloy-ing elements and may be heat treated over a wide range to give the combined advan-tages of proper hardness, strength and ductility. J. 4140 is now available with improved machinability, which greatly increases feeds and/or speeds, while also extending tool life without adversley affecting Stormcrow, the steel used and the heat treat are somewhat shape dependent on power hammer dies. Shiny surface. 75-1. Cool in still air. In the heat treated and quenched condition machining is best limited to finish grinding. Heat treatment: austenitized 999 deg. 4140 heat treat properties