ASTM A Standard Specification for Cold Finished Alloy Steel Bars. Find the most up-to-date version of ASTM A at Engineering See the chemical composition and physical properties of ASTM A Grade Steel, find alternative materials, and connect with suppliers.

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This site uses cookies. By continuing to use this website, you agree to their use. Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding. AISI is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened astmm.

8620 Alloy Steels Material Property Data Sheet – Product availability and request a quote

Carburize at to F in an appropriate carburizing medium and oil quench to harden. Hardening is done by oil quench from F.

Improved carburized case and core properties can a331 obtained by furnace cooling from carburizing at – F and then reheating to F. Speaking of Precision Blog Sensemaking for the precision machining industry.

ASTM A – 95() Standard Specification for Steel Bars, Alloy, Cold-Finished (Withdrawn )

This case-hardening will result in good wear characteristics. These specifications, standards and descriptions often specify mandatory product attributes.

Consult the alloy supplier for information as to temperatures. In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts. Hot working may be accomplished prior to hardening or carburizing. From there it may be air cooled.


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This alloy is typically used for carburized parts where a hardened case is desired for wear resistance. To find out more, including how to control cookies, see here: Preheating at F is beneficial and subsequent asrm after welding a3331 recommended – consult the approved weld procedure for the method used. Tempering of heat treated and water quenched parts not carburized is done at F to F with greater hardness the lower the tempering temperature.

Click Here to Email Me. A request for an assist always results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff. Forming characteristics of alloy are good in the annealed condition. The alloy may be welded by conventional methods, usually gas or arc xstm.

The alloy may be forged at F down to F prior to the hardening heat treatment or carburizing. For Email Marketing you can trust. Sometimes the replacement standard or specification contain different product requirements. The time to catch an obsolete specification is during contract review, before there are commitmemnts to material and or sunk costs of material, production and inspection. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required This material is stocked primarily in Bar Products by 59 distributors but is also available to a lesser extent in Flat Rolled Products, Tubular Products, Wire Products, Forging Products, and Casting Products.


The alloy may be cold worked in the annealed condition by conventional methods. Machining is done prior to carburizing to within as close a tolerance as possible. Not applicable to this alloy. There were over 19, cancelled or superceded specifications, commercial item descriptions and standards when I first prepared my list of Obsolete Federal Specifications for cold finished steel in Following carburizing of heavy sections a reheat at F will enhance both case and core properties of the alloy.

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Tempering of carburized parts is done at to F and this will result a331 the alloy having a core strength of approximately ksi minimum with Rockwell C case hardness of Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing. Where do you go for astk assist when wierd, strange, and unusual specifications appear in a quote package?

This alloy may be hardened by heating to F followed by a water quench. Create a free website or blog at WordPress. Modulus of Elasticity Tension.