Chrome alloy steels, such as 4, 4140, and 4340 are so named because. Pre hardened and tempered 4340 can be further surface hardened by flame or. Throughhardening low alloy steel bar 4340 atlas steels. The graph bars on the material properties cards below compare normalized saeaisi 4340 to. Throughhardening low alloy steel bar 4340 colour code. However, reported literature on laser processing of aisi 4340 steel primarily discuss laser surface treatment and its effect on the mechanical properties of the alloy. Elevated temperature fatigue properties of sae 4340 steel by defense technical information center. This steel presents a good hardening ability that promotes the improving of its mechanical properties when submitted to quenching and tempering. Kinetic study on martensite formation in steels 1045 and. Ac manufacturing has the experience, knowledge, and cnc equipment required to machine a wide array of materials, including alloy steel 1400. Sae 4340 steel has demonstrated interesting applications where good mechanical and magnetic properties are necessary, at a low cost.
Stabilizer magnadur 501 shaft typical applications of. Astralloy steel products is a hollyoned susidiary of nucor corporation the largest producer of steel in the united states. Sheet steel or strip steel that is manufactured by 1 press braking blanks sheared from sheets or cut length of coils or plates, or by 2 continuous roll forming of cold or hotrolled coils of sheet steel. The chemical properties of 4 and 4140 steel have differences in carbon, manganese and chromium concentrations. Properties summarized are for one heat of 1050 steel that was forged to 38 mm 1 so in. This paper attempts to redress that lacuna by providing the mts parameters for a number of tempers of 4340 steel classi. Pdf mechanical properties analysis of 4340 steel specimen heat.
Samples were evaluated in standard tensile test to access their characteristic quantities. With astralloyvs superior chemistry and work hardening surface, the pins will endure the. Alloy description timkensteels 4140hw grade is a finegrained, lowalloy steel that offers optimum heattreat response in heavier crosssections. Atlas 4340 is an alternative to atlas 6582 throughhardening steel and to jis scnm447. Aisi 4340 has a favorable response to heat treatment usually oil quenching followed by tempering and exhibits a good combination of ductility and strength when treated thusly. Alloy steel 4340 metal supermarkets steel, aluminum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Aisi 4 alloy steel aisi 4 steel stockholders and suppliers, delivering to the whole of the uk.
Aisi 4 is a chromium molybdenum alloy steel specification. Aisi 4340 steel, annealed, 25 mm round subcategory. It is supplied as round bar commonly in the hardened and tempered condition with a hardness of 1822 hrc. These grades must exhibit enhanced toughness properties even at low tempe ratures and sometimes also in the transverse direction. With a lower carbon content range aisi 4 provides better. Keywords austempering temperature, aisi 4340 steel.
Steel of the alloy 4340 can be heat treated heated to a set temperature for the particular material and then quenched using an oil quench to increase the alloys strength. The mechanical threshold stress model for various tempers. The steel alloy of grade 8620 is also called nickelchromiummolybdenum steel. If im not able to find the entire curves, then it would be helpful to at least get an estimate of the saturation flux density. Machining is done typically in the annealed condition. The relatively high carbon content provides this alloy with superior strength in applications where severe service conditions exist. Astralloyv pins will outlast pins made out of en30b by at least 25% and will increase the wear life of pins made from 4330 by as much as 30%. It has the highest strength compared to the other variants of saeaisi 4340 steel. Hardness, knoop, 348, 348, converted from brinell hardness.
Because of richer alloy content, 4340 possesses much deeper hardenability than the 4100 series. Their suitability comes from their distinctive hardness, resistance to abrasion. It has remarkable nondistorting properties for an alloy steel. Table 1 lists mechanical properties of selected steels in various heattreated. Properly hardened and formed, it can be used to make hardwearing machine parts. However, the hy100 model failed to produce results that were in agreement with experimental stressstrain data for 4340 steel. Sae 4340 is a typical low alloy medium carbon steel for quenching and tempering.
It is known as an ultra high strength grade of steel and serves a variety of applications for highly stressed parts. Normalized saeaisi 4340 is saeaisi 4340 steel in the normalized condition. Aisi 4340 is a nickel chromium molybdenum alloy steel specification widely used in the oil and gas sectors. Continental steel pte ltd 100 gul circle, singapore 629586. Pdf files down sncm439 steel form of supply jis sncm439 alloy steel be supplied the round bar, steel flat bar, plate, hexagonal steel bar and steel square block. This advantage is realized principally where high strength is required in heavy sections. Aisi 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. The following are the mechanical properties for both normalized and annealed 4 and 4340 steel. The thickness of bare steel exclusive of all coatings. Our custom design and manufacturing services means you receive a unique solution to your complex component problems. Phosphorus, p max sulfur, s max mechanical properties. Effect of tempering temperature on roomtemperature mechanical properties of 1050 steel.
This material has a high fatiguetensile ratio and maintains strength, ductility, and toughness at relatively high temperatures. Information regarding differences of steel grades and their properties came from the mcmastercarr. It is a nickelchromiummolybdenum medium carbon alloy steel with deep hardenability. Constantlifetime fatigue diagram for aisisae 4340 alloy steel bars. Jade band marigold introduction atlas 4340 is a nominally 1. Aisi 4340 has a favorable response to heat treatment usually oil quenching followed by. Chemical composition and mechanical properties of selected alloys in their nonheat treated condition are listed in the.
Aisi 4340 alloy steel aisi 4340 steel stockholders and suppliers, delivering to the whole of the uk. Tool steel refers to a variety of carbon steel and alloy steel that are particularly wellsuited to be made into tools. Aisi steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. Aisi 4340 e4340 alloy steel is a medium carbon, low alloy steel known for its toughness and strength. Steels for oil and gasexploration providing special steel solutions. This steel can obtain much deeper hardenability than 4100 series steel. Fusion and resistance welding is also possible with our 4340 steel from stock. Other steel pins have failed in service due to cracking from the harsh environment and repeated fatigue cycles. Saeaisi wrought steels top, all iron alloys middle, and the entire database bottom. Hardened and tempered alloy steel can also be nitrided, giving a surface hardness of up to rc november 21st, 0 comments.
Microstructural evolution of aisi 4340 steel during direct. High strength in heavy sections is possible with maximum toughness and ductility. Saeaisi 4340m steel is an alloy steel formulated for primary forming into wrought products. Influence of starting particle size conference paper pdf available october 2015 with 368 reads how we measure reads. Pdf dmls direct metal laser sintering of 4340 steel. Few published works have also reported the microstructural characterization of post laser treated aisi 4340 steel surfaces.
Additionally the samples were subjected to a microhardness test, which has significant importance due to his potential correlation with mechanical properties. Tensile steel, generally supplied hardened and tempered to condition. Also has excellent nondistorting properties for an alloy steel. Aisi 4340 is also one kind of nickel chromium molybdenum steels. This medium carbon alloy grade is widely used for many general purpose parts requiring high tensile strength and toughness. It is a sturdy alloy, largely composed of carbon, with many uses in the manufacturing trades. U in sections up to 100mm, with a tensile strength of 930 1080 mpa and aiming for.
1029 857 1370 1380 416 28 341 1482 1222 1550 1486 380 835 730 1497 825 646 399 646 365 354 1248 56 1487 1033 962 1081 196 1245 118 35 278 690 1202 1492 13