Rockwell Scale C Hardness: 20, 28, 37, 44, and 52. Its hardness is in the range of 28-32 HRc. AISI 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. What is 4140 steel. C): room and 340. 4140 & 4150 HOT ROLLED HEAT TREATED (Rc 28/34) BAR STOCK. A wide range of mechanical properties can be obtained by tempering between 100 degrees symbol and 1200°F. 3) Tempering recommendations from the ASM heat treaters guide for 4140-4142 is a minimum of 400°F. 4140/42PH is a widely used quenched and tempered medium carbon alloy steel. Material tempered for 2 hours at tempering temperature . Formation of the desired microstructures was demonstrated by metallographic examinations and hardness . The grade is especially suitable for forging because they . It is widely used for various applications that require high tensile strength and toughness. Compressed air quench will result in lower hardness levels than water quench . round Available Properties Density Hardness, Brinell Hardness, Knoop, Converted from Brinell Hardness, Rockwell B, Converted from Brinell Hardness, Rockwell C, Converted from Brinell Hardness, Vickers, Converted from Brinell Tensile Strength, Ultimate Tensile Strength, Yield Before hardening, it can be normalized by heating at 913°C (1675°F) for a long period of time followed by air cooling. Typical tensile strength ranges from 114,000 PSI (Annealed Condition) up to 156,000 PSI (Pre-Hard, Quench and Tempered Condition). On the contrary, pre-heated and pre-hardened AISI 4140 steel is treated to a medium-level hardness between 28 and 32 HRC. Tempering AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The higherer Cr and Mo content can improve the hardness, ductility and strength after heat . Another way for hardening this steel is Nitriding.With temperature 500-550℃,AISI 4140 Steel can get surface hardness up to 600-650HV. All specimens were austenitised at 860°C/30 min. For each property being compared, the top bar is quenched and tempered SAE-AISI 4140 and the bottom bar is SAE-AISI 4142 steel. It is a "little" hard compared to 4140 in it's soft condition. AISI 4140 steel is widely used as gears, bolts, couplings, spindles, tool holders, sprockets, oil industry drill collars, tools joints, etc. When compared with standard 4140 heat treated to the same tensile and yield strengths, 4140HW achieves significantly higher Alloy Quenched & Tempered (Q&T) Steel Plate. Dave-What are the service/application requirements of this weldment?Is hardness, tensile strength, etc a factor? AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. 4140 qt Steel Round Bar is 4140 steel bar after quenching and tempering with . AISI 4340 and AISI 4140 are normally used for different structural applications in quenched and tempered state due to their high strength, high abrasion and fatigue resistance but they lack toughness. A tempering temperature of 800F will result in a final hardness of Rc 40 minimum. The chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. Exactly the hardness and mechanical strength you need. 2) 4140 steel used for bending machine molds. . But it should be tempered for any heavy use. Equivalent Materials EN 1.7225 UNS G41400 More This material data has been provided by Sverdrup Steel. then cooling in furnace to 480 ºC, then cool in air. Average BHN 187 TOLERANCES Rounds The lowest practical tempering temperature, 400F, will result in a final hardness close to the as-quenched level. 1) 4140 steel belongs to the alloy structural steel. 4140 Price Per Pound 4140 Quenched And Tempered , Find Complete Details about 4140 Price Per Pound 4140 Quenched And Tempered,4140 Steel Hardness 4140 Pht 4140 Condition T,4140 Ht Material Properties 4140 Prehard Machinability,4140 Ht Hardness 4140 Hardness Range Sae 4140 Properties from Steel Sheets Supplier or Manufacturer-Jiangsu Maxi Metal Co., Ltd. 4140 round steel tube or pipes are medium carbon alloy grades with high tensile strength and toughness after quenching and tempereing, that is also to say q&t 4140 steel tube. A wide range of mechanical properties can be obtained by tempering between 400° and 1300° F. Forging Heat to 2100° to 2200° F Normalizing Heat to 1600° - 1700° F. Cool in air. 2) Fully hardened 4140 ranges from 54 to 59 HRC. 4140 qt Steel Round Bar is 4140 steel bar after quenching and tempering with . . Material is quench & tempered, stress relieved and machine straightened. 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 . Typical process for AISI 4140 steel is water/oil quench that can reach the hardness levels to 54-59HRC. The AC3 of AISI4140 steel is 826℃, so we choose 870℃ as the quenching temperature. For the experiment, 1045 and 4140 steels were used for quenching with water, oil, air cool- ing, and oil cooling to investigate its effects on the metal properties. 4140 has a hardening range of 1525° - 1625°F. If this is the case you will be overmatching which is not necessarily good when we're dealing with this type of material. We can also offer these bars in a variety of lengths. 53-58. What is 4140 steel. 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Temperatures (deg. 1.7225 is the type of SAE 4140 that can be used in a ready-made semi-hardened (quenched + tempered) state. These hardness values are for as-quenched material and final hardness will need to be reduced by tempering before the part can be put into use. AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace. Supplied in as rolled condition, but less common conditions - annealed, normalized and normalized and tempered - can be special-ordered. Welding Welding is not recommended because of the likelihood of quench cracking occurring. 4140 ~En19A 1.7225 4140 41CrMo4 ~708 M 40 DESCRIPTION Chromium, Molybdenum steel for applications requiring high tensile strength and toughness values, in particular in medium and large cross sections in the quenched and tempered condition. Tempering Temperature. Hardness values of AISI 4140 steel samples which have been austenitized at 900 C, 880 C and 860 C followed by oil quenching, forging and tempering at 640 C, 570 C and 480 C are shown in Fig. When it is provided low hydrogen consumables, Grade 80 steel can be welded to itself and other grades of steel. Structural steel, strong and hardenable. 4140 annealed is supplied in the soft condition and can be hardened to RC 40. Note: 4140 HTcan be surface hardened . 4140 steel plates: 4140 Quenched & Tempered Steel Plate | OTAI. These hardness values are for as-quenched material and final hardness will need to be reduced by tempering before the part can be put into use. These results are influenced by both the thermal treatment applied and the alloying elements present. It has the highest strength compared to the other variants of SAE-AISI 4140 steel. Quenched and Tempered 4140 Cr-Mo Steel SAE-AISI 4142 (G41420) Cr-Mo Steel 4140 HT is a medium carbon alloy steel heat treated to a . All metrics apply to room temperature unless otherwise stated. AISI 4140 PH AISI 4140 PH is a quenched and tempered chrome-moly steel, typically supplied at 262-321 Brinell. They are generally in the range 0f 26-32 HRc. AISI 4140 Steel, oil quenched, 540°C (1000°F) temper, 25 mm (1 in.) Accordingly, the optical (Fig. Typical analysis is shown in the chart below: Carbon Manganese Chromium Molyebde num 0.38% -0.43% 0.75%- 1.00% 0.80% - 1.10% 0.15% - 0.25% AISI 4140 PH is used in applications requiring good Nitriding is carried out at 490 oC - 530 C, followed by slow cooling (no quench) reducing the problem of distortion.Parts can therefore This material has a minimum yield of 110,000 PSI. . 4140 can attain high mechanical properties (260,000 psi tensile and 235,000 psi yield) in the hardened condition of 500 Brinell. The chemical composition of the steel is shown in Table 1. Call or Email Us For a Free Quote. Tempering temperature of 4140 alloy steel can be from 204-649 °C (400-1200°F) after normalizing and oil quenching, and the corresponding Rockwell hardness can be obtained. The hardness of But it should be tempered for any heavy use. 4140 round steel tube or pipes are medium carbon alloy grades with high tensile strength and toughness after quenching and tempereing, that is also to say q&t 4140 steel tube. Surface hardness achievable is 600 to 650HV. 4140 alloy steel round tube . The Molybdenum additions prevent the steel from being . The hardness after heat treat­ ment is about 450 HV0.1. The desirable properties of the AISI 4140 include superior toughness, good ductility and good wear resistance in the quenched and tempered condition. 4140 shaft steel material is 4140 steel Round Bar after turned or peeled, cneterless ground and polishedsteel bar to be used as 4140 steel shafts in machinery or automobile parts. The Q&T process involves bringing steel plate to an extremely high temperature and rapidly cooling with water (quenching . 3) Besides, it can be used to under 2000m deep well of oil drill pipe joint and the fishing tool. The American alloy holder steel of choice, 4140 Pre-hard combines free machining properties with uniform hardness and durability. 1) 4140 is an OK die steel but is not recommended for radical shaped dies such as narrow fullering, crown and so on. Movement during/after machining may or may not be problematic, depending on the amount and configuration of material to be removed . Ta e bl 1 Ch em1ca ic I comoos1t1on o f AISI 4140 Chemical composition wt.-% c I Cr I Mo I Mn I Si I Ni I Fe We stock AISI 4140 and AISI 4150 steel in rounds, squares, and flats. 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). 4140/42 PH. Quenched and tempered SAE-AISI 4140 is SAE-AISI 4140 steel in the quenched and tempered condition. The material used for experimental investigation was quenched and tempered (450°C/ 2 h) AISI 4140. If welding must be carried out, pre-heat to 200 to 300°C and maintain this while welding. Different tempering temperatures are designed in the heat treatment simulation furnace. Alloy quenched and tempered (Q&T) steel plate is created with the necessary hardness and durability to be used in applications that must withstand severe impact and abrasion. Hardness, Rockwell B (converted from Brinell hardness) 92 92 . What is the hardness of 4140 annealed? The presence of chromium and molybdenum tends to give 4140 steel some extra mechanical advantages than ordinary steel. The high hardness of 4340 alloy steel requires that the material be welded in the annealed or tempered state and then heat treated to resist martensite formation and cold cracking. 4140 hardened and tempered bar can also be successfully nitrided, giving a surface hardness of up to Rc 60. Both quenched and tempered SAE-AISI 4140 and SAE-AISI 4142 steel are iron alloys. 4140 selected for welding would have a minimum tensile strength of about 90ksi. AISI 4140 Steel Hardening & Quenching 4140 Steel is usually used at 18-22 HRc, If needs, AISI 4140 alloy steel can be hardened or Quenching by cold work. 3a . 4140 QT Sizes ½" OD to 26" OD. 2) Fully hardened 4140 ranges from 54 to 59 HRC. quench & tempered 150/115/7 4140 sae-ams22141a astm-a732 gr 8q annealed and carbon restored rc 20 max 4140 sae-ams22141a astm-a732 gr 8q quench & tempered 180/145/5 4330 astm-a732 gr 9q annealed, carbon restored, quench & tempered 150/115/7 4330 mil-a-11356 annealed, carbon restored, quench & tempered 12-50 charpy impact value 600. o. F . 400. o. F . Heat treatment process: normalizing temperature is 905℃, quenching temperature is 870℃, cooling method is water cooling, tempering temperature is 580 ℃, 600℃, 620 . Available in grade 4140 in both standard (under 3-inches) and heavy (3-inches or greater) plate thicknesses. followed by quenching in oil. mechanical properties.Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening and by nitriding.4140 is used extensively in most industry sectors for a wide range of applications such as Adapters,Arbors,Axle Shafts,Bolts,Crankshafts,Connection Rods,Chuck Bodies,Collets,Conveyor Pins Rolls,Ejector4140 Steel . Forging Material 4140 forging temperature is about 1232 °C (2250 °F). To achieve this goal, samples of 4140 steel were quenched and tempered at 300, 400, 500, and 600 ºC for the same total heat time in single and double tempers. Since AISI 4140 steel is a type of steel that contains medium-carbon levels, it is quenched to so that it can reach hardness levels that range between 54 and 59. Very suitable for induction hardening (approximate hardness of 56 HRC). round Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel. 4140/42PH is an oil-hardening steel of relatively high harden ability. AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. But in actual production,medium-level hardness 28-32 HRC is widely used. This leaves near full hardness. With this steel one can achieve very good properties on the whole cross-section (while quenching in oil, the max diameter is 70mm, for quenching in water it is 50mm). 3) Tempering recommendations from the ASM heat treaters guide for 4140-4142 is a minimum of 400°F. Average BHN 285 Annealing Heat to 1450° - 1550° F. Cool slowly in furnace. depth. AISI 4140 chrome-molybdenum steel can be oil hardened to a relatively high level of hardness. The quenched specimens were then tempered at various temperatures between 200°C and 600°C. 4140, also referred to as F5 is a chromemoly steel primarily used for flanges and pipe fittings around industry. For example, axles, shafts, bolts, gears, and other applications. 4140 (depending on its condition - annealed, quenched and tempered, etc.) ASTM A519 4130, 4140, 4142 pipe and tube chemical and mechanical specifications. Induction or Flame Hardening Atlas 4140 can be surface hardened to 58HRC (typical value). The hardness of the steel can be increased if it has a lower tempering temperature. Mill test reports are supplied with each order. Instead of being quenched at the required temperature of 1575°F, the temperature is reduced to 1375°F. What are the Mechanical Properties of 4140 Steel? Representative hardness levels after tempering are tabulated below. Quenched and Tempered Steel is segmented in terms of grades such as: a) Grade 80. b) Grade 400. c) Grade 500. The desirable properties of the AISI 4140 include superior toughness, good ductility and good wear resistance in the quenched and tempered condition. Yield strengths range from 110 ksi through 140 ksi, but we can temper it to other strength levels. 43. 4140 shaft material. Welding of 4140 Steel 3. 4140 alloy steel round tube . The max hardness you can get out of 4140 is @56-57 Rc (unless you carbo-nitride it). AISI 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components. This kind of steel is categorized as quenched-tempered steels which their dominant phase after heat treatment is tempered martensite , , . Not all AISI 4140 and 4150 materials are made to the same standards. Hardness (HRC) As Quenched. The 4140 quenched and tempered bar that Pride Metals stocks is a stronger type of metal with a hardness of 30 to 36 RC. The hardness test result was 51 ± 0.35 HRC, in agreement with that expected for type 4140 steel quenched and tempered at temperatures around 300°C [10, 11]. 4140 Chromium-Molybdenum Steel 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Hardness, Rockwell B (converted from Brinell hardness) 92 92 . A tempering temperature of 800F will result in a final hardness of Rc 40 minimum. The higherer Cr and Mo content can improve the hardness, ductility and strength after heat . It is harder than regular steel. Typical Analysis Carbon .40 The samples were machined to ASTM standard impact testing. AISI 4140 is a 1% chromium - molybdenum medium hardened general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000 MPa. Common sizes that we supply in quenched and tempered bars range from 5/8″ up to 16″ rounds. Supplied in the annealed or prehardened condition. Figures 13-18 show fatigue-life curves for 4140 steel exposed to different ambient conditions. ASTM 4140 Steel Annealing Slowly heat to 800～8500 ºC, keep enough time, ensure heat thoroughly. The Quenching process hardens the steel, while the Tempering process restores some of the ductility and removes some of the brittleness acquired during heat treating. 4140 alloy steel round tube . 4140 alloy steel round tube . 4140 steel plates: 4140 Quenched & Tempered Steel Plate | OTAI. 4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.4140 Annealing delivery hardenss less than 250HB. AISI 4140 chrome-molybdenum steel can be oil hardened to a relatively high level of hardness. Is 4140 steel good for knives? 4140 alloy steel quenched and tempered process: Before quenching, need to check whether there are cracks in the surface of the AISI 4140 steel, to prevent the quenching process since the steel surface crack lead to quenching crack. 4140 round steel tube or pipes are medium carbon alloy grades with high tensile strength and toughness after quenching and tempereing, that is also to say q&t 4140 steel tube. Quenched and tempered for increased through-hardening. Good machining in quenched and tempered condition. Properties The physical properties of 4140 CF Q&T greatly depend on the Heat Treating/Tempering processes that have been done to the material. Because of this strength, 4140 steel is easily machined and responds well to 3 AISI 4140 steel which has been austenitized at 900 C for 140 mins, has the average descends to 358 HB after tempering at 480 C for 200 The higherer Cr and Mo content can improve the hardness, ductility and strength after heat . AISI 4140 and 4150 steels offer a high resistance to fatigue, improved toughness, impact resistance, and torsional strength. 4140 Ground And Polished Steel Bar is usually quenched and tempered to get higher mechanical properties and hardness. As shown on Fig. Its most common applications are for high-strength bolts, gears, crankshafts, connection rods, sleeves, shafts for machinery and engines. Before hardening, it can be normalized by heating at 913°C (1675°F) for a long period of time followed by air cooling. followed by quenching in oil. Quench in oil. It is widely used for various applications that require high tensile strength and toughness. For tempering, 1045 steel was tempered at 300oC and 500 oC for 10, 20, 35, 55, and 80 mins. 4140 Chromium-Molybdenum Steel. For example, axles, shafts, bolts, gears, and other applications. variety of bar and tubing applications in quenched and tempered conditions. 800. o. F . However, as in motor shaft applications, under quenching and tempering conditions, 4340 steel typically use high preheating in low hydrogen processes. The hardness of 4140 round steel tube or pipes are medium carbon alloy grades with high tensile strength and toughness after quenching and tempereing, that is also to say q&t 4140 steel tube. 4140 has a hardening range of 1525° -1625° F. Quench in oil. Material Notes: As quenched hardness after oil quenching: Surface - 55 HRC, 1/2 radius - 55 HRC; Center - 50 HRC The lowest practical tempering temperature, 400F, will result in a final hardness close to the as-quenched level. 4140 shaft material. The most common grade we supply in quenched and tempered bar is 4140, although we do supply a variety of other grades. 47. It is a material known as tempering steel in the industry, which can be used in shafts, gears, and machine parts working under high tensile strength thanks to its high tensile strength. 42CrMo4, 1.7225, 42CrMoS4, 1.7227, AISI 4140 - description. Alloy 4140 is a direct hardening alloy that can be quenched and tempered to obtain a wide range of hardness, ductility and strength levels. 4140 annealed is supplied in the soft condition and can be hardened to RC 40. It is widely used for various applications that require high tensile strength and toughness. 4140 Ground And Polished Steel Bar is usually quenched and tempered to get higher mechanical properties and hardness. Steel quenching in bell-type furnace, installed furnace capacity controlled at about 20t, uniform heating to (890 . China aisi 4140 tube hardness Manufacturer & supplier, offer different kinds of Aisi 4140 Steel Pipe Hardness,Aisi 4140 Hollow Bar Hardness,Aisi 4140 Tube and Pipe Hardness for customers. Tom and rkucbel - 4140 prehard refers to a specific product that is heat treated and tempered to Rc 28-32. The molybdenum and chromium components give it a uniform hardness, as well as high strength. 4140 Pre-Hard: #2 steel. 4140 annealed is supplied in the soft condition and can be hardened to RC 40. IS AISI 4140 STEEL SUITABLE FOR SHAFTS? It is widely used for various applications that require high tensile strength and toughness. National supplies re-sulfurized quenched and tempered 4140 to aid machining while retaining toughness for extended tool life. and water-quenched identically. 4140 QT is relatively easy to machine in the heat-treated state. The higherer Cr and Mo content can improve the hardness, ductility and strength after heat . By contrast, 4140 is a medium-carbon (nominal 0.40%C) chromium-molybdenum alloy steel that is most often oil quenched to attain an as-quenched hardness ranging from about 54-59 HRC (as quenched), depending on the precise carbon content (which affects the hardenability of the material). 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Grade 80 steel - It is a high hardness, abrasion-resistant steel with appropriate carbon percentage to optimize welding. All material is provided in a hot roll finish. Steel treatments: quenched-and-tempered, shot-peened, ground, deep-rolled, and as-received. The Rockwell hardness and Charpy V-notch impact energy were measured. 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. 51. Tempering Temper one hour per inch of section thickness to desired hardness. Disk shaped specimens were prepared from SAE 4140 steel bars. After Quenching & Tempering, its hardness is 28-34 HRC. AISI 4140 Steel, oil quenched, 205°C (400°F) temper, 25 mm (1 in.) can have extremely high tensile strength. Other desirable properties include good wear resistance, excellent toughness and good ductility in the quenched and tempered condition. In the surface hardened condition in achieves a hardness of 54-59 HRC on the . Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077 1. 4140 shaft steel material is 4140 steel Round Bar after turned or peeled, cneterless ground and polishedsteel bar to be used as 4140 steel shafts in machinery or automobile parts. After annealing, the hardness 92 HBS Max. Grade 4140 and Grade 4142 are quenching and tempering steels in accordance with American codes of practice for the mechanical-engineering and tool-making fields, with a defined hardness range, unlike steels in accordance with the American standard. Their average alloy composition is basically identical. Has the mat'l been quenched and tempered, annealed, stress relieved from the "as received" condition?From your posting it appears you will insert the tube into the plate and make a 1/4" fillet weld inside? This leaves near full hardness. 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.

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