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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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By continuing to use this website, you agree to their use. Tempering of carburized parts is done at to F and this will result in the alloy having a a331 strength of approximately ksi minimum with Rockwell C case hardness of Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F. Hot working may be accomplished prior to hardening or carburizing.

Not applicable to this alloy.

Sign up for our Newsletter. Consult the alloy supplier for information as to temperatures. Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package? AISI is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened part. From there it may be air cooled. The alloy may be cold worked in the annealed condition by conventional methods.

Click Here to Email Me. Hardening is done by oil quench from F. The time to catch an obsolete specification is during contract review, before there q331 commitmemnts to material and or sunk costs of material, production and inspection.



ASTM A Standard Specification for Cold Finished Alloy Steel Bars

Carburize at to F in an appropriate carburizing medium and oil quench to harden. 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. There were over 19, cancelled or superceded specifications, commercial item descriptions and standards when I first prepared w331 list of Obsolete Federal Specifications for cold finished steel in Modulus of Elasticity Tension. This site uses cookies. Preheating at F is beneficial and subsequent heating after welding is recommended – consult the approved weld procedure for the method used.

Sometimes the replacement standard or specification contain different product requirements.

To find out more, including how to control cookies, see here: Mean Coeff Thermal Expansion. This case-hardening will result in good wear characteristics.

ASTM A331 Rods for Construction, Length: 3 & 6 m

Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding. Following carburizing of heavy sections a reheat at F will enhance both case and core properties of the alloy. A request for an assist always results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff.

Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to axtm weeks depending on size and form required This material is stocked primarily in Bar Products by 59 distributors but is also ashm to a lesser extent in Flat Rolled Products, Tubular Products, Wire Products, Forging Products, and Casting Products. Forming characteristics of alloy are good in the annealed condition.


Machining is done prior to carburizing to within as close a tolerance as possible.

This alloy may be hardened by heating to F followed by a water quench. Speaking of Precision Blog Sensemaking for the precision machining industry. In the carburized condition this asttm is used for gears, ring gears, shafts and crankshafts.

ASTM A331 Grade 4140H

Create a free website or blog at WordPress. Tempering of heat treated and water quenched parts not carburized is done at F sstm F with greater hardness the lower the tempering temperature. This alloy is typically used for carburized parts where a hardened case is desired for wear resistance. For Email Marketing you can trust. The alloy may be forged at F down to F prior to the hardening heat treatment or carburizing. These specifications, standards and descriptions often specify mandatory product attributes.