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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Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing. The alloy may be welded by conventional methods, usually gas or arc welding.

ASTM A331 Grade 4140H

A request for an assist always results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff. Click Here to Email Me. These specifications, standards and descriptions often specify mandatory product attributes. The alloy may be cold worked in the annealed condition by conventional methods.

Modulus of Elasticity Tension. From there it may be air cooled. To find out more, including how to control cookies, see here: Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package? The alloy may be forged at F down to F prior to the hardening heat treatment or carburizing. Create a free website or blog at WordPress. Hot working may be accomplished prior to hardening or carburizing. Mean Coeff S331 Expansion.


Tempering of heat treated and water quenched parts not carburized is done at F to F satm greater hardness the lower the tempering temperature. For Email Marketing you can trust. This site uses cookies.

Speaking of Precision Blog Sensemaking for the precision machining industry. Following carburizing of heavy sections a reheat at F will enhance both case and core properties of the alloy. Preheating at F is beneficial and subsequent heating after welding is recommended – consult the approved weld procedure for the method used.

Hardening is done by oil quench from F. Sometimes the replacement standard or specification contain different product requirements.

Forming characteristics of alloy are good in the annealed condition. Machining is done prior to carburizing to within as close a tolerance as possible.

Tempering of carburized parts is done at to F a31 this will result in the alloy having a core strength of approximately ksi minimum with Rockwell C asrm hardness of 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.

Carburize at to F in an appropriate carburizing medium and oil quench to harden. In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts. Consult the alloy supplier for information as to temperatures. This alloy may be hardened by heating to F followed by a water quench. Not applicable to this alloy.


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

By continuing to use this website, you agree to their use. 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. 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 part.

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 This case-hardening will result in good wear characteristics. This alloy is typically used awtm carburized parts where a a31 case is desired for wear resistance. Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F.

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