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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Carburize at to F in an appropriate carburizing medium and oil quench to harden.

ASTM A331 Grade 4140H

Hot working may be accomplished prior to hardening or carburizing. Modulus of Elasticity Tension. By continuing to use this website, you agree to their use.

Consult the alloy supplier for information as to temperatures. This alloy may be hardened by heating to F followed by a water quench.

To find out more, including how to control cookies, see here: The alloy may be forged at F down to F prior to adtm hardening heat treatment or carburizing. This case-hardening will result in good wear characteristics.

ASTM A Standard Specification for Cold Finished Alloy Steel Bars

There were over 19, cancelled or superceded specifications, commercial item descriptions and standards when I first prepared my list of Obsolete Federal Specifications for cold finished steel in These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 zstm. This site uses cookies. This alloy is typically used for carburized parts where a hardened case is desired for wear resistance.


Forming characteristics of alloy are good in the annealed condition. 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.

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 C case hardness of Click Here to Email Me.

The alloy may be cold worked in the annealed condition by conventional methods.

Hardening is done by oil quench from F. Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding. Sometimes the replacement standard or specification contain different product requirements.

Following carburizing of heavy a3311 a reheat at F will enhance both case and core properties of the alloy. For Email Marketing you can trust.

ASTM A | Speaking of Precision Blog

Speaking of Precision Blog Sensemaking for the precision machining industry. A request for an assist awtm results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff.

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.


Mean Coeff Thermal Expansion. Preheating at F is beneficial and subsequent heating after welding is recommended – consult the approved a31 procedure for the method used. From there it may be air cooled. The alloy may be welded by conventional methods, usually gas or arc welding. Tempering of heat treated and water quenched parts not carburized is done at F to F with greater hardness the lower the ashm temperature.

AISI is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened part. Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package? Create a free website or blog at WordPress. Machining is done prior to carburizing to within as close a tolerance as possible. In the z331 condition this alloy is used for gears, ring gears, shafts and crankshafts.

Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing. Not applicable to this alloy.

Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F. Sign up for our Newsletter.