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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Not applicable to this alloy. This alloy may be hardened by heating to F followed by a water quench. Click Here to Email Me. Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package?

40S83 Stud Assemblies – Knurled Cylindrical Head

From there it may be air cooled. Modulus of Elasticity Tension.

Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding. 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.

Sometimes the replacement standard or specification contain different product requirements. 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 aastm is also available to a lesser extent in Flat Rolled Products, Tubular Products, Satm Products, Forging Products, and Casting Products.


ASTM A331 Grade 4140H

Tempering of heat treated and water quenched parts not carburized is done at F to F with greater hardness the lower the tempering temperature. Tempering of carburized parts is done at to F and this will result in the alloy having a core strength of approximately ksi minimum with Rockwell A331 case hardness of Hardening is done by oil quench from F. The alloy may be cold worked in the annealed condition by conventional methods. Create a free website or blog at WordPress.

This site uses cookies. Preheating at F is beneficial and subsequent heating after welding is recommended – consult the approved weld procedure q331 the method used.

Carburize at to F in an appropriate carburizing medium and oil quench to harden. Sign up for our Newsletter. Machining is done prior to carburizing to within as close a tolerance as possible. The alloy may be welded by conventional methods, usually gas or arc welding. For Email Marketing you can trust.

Consult the alloy supplier for information as to temperatures. Cold working, as with machining, should be done to a331 close a tolerance as possible before heat treatment or carburizing. In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts.

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.


This alloy is typically used for carburized parts where a hardened case is desired for wear resistance. Following carburizing of heavy sections a reheat at F will enhance both case and core properties of the alloy.

Mean Coeff Thermal Expansion.

40S83 Stud Assemblies – Knurled Cylindrical Head On Arconic Fastening Systems

This case-hardening will result in good wear characteristics. Hot working may be accomplished prior to hardening or carburizing. By continuing to use this website, you agree to their use.

The alloy may be forged at F down to F prior to the hardening heat treatment or carburizing.

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 These specifications, standards and descriptions often specify mandatory product attributes.

AISI is a hardenable chromium, molybdenum, nickel low ast steel often used for carburizing to develop a case-hardened part. To find out more, including how to control cookies, see here: Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F. Speaking of Precision Blog Sensemaking for the precision machining industry.