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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Modulus of Elasticity Tension.
Hardening is done by oil quench from F. Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing. Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding.
ASTM A331 Grade 4140H
Forming characteristics of alloy are good in the annealed condition. Speaking of Precision Blog Sensemaking for the precision machining industry. Mean Coeff Thermal Expansion. 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: From there it may be air cooled. The alloy may be cold worked in the annealed condition by conventional methods. This a313 is typically used for carburized parts where a hardened case is desired for wear resistance. There were over 19, cancelled or superceded specifications, commercial item descriptions and standards when I first prepared my list of Obsolete Federal Specifications for cold finished steel in A request for an assist always results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff.
40S83 Stud Assemblies – Knurled Cylindrical Head On Arconic Fastening Systems
These specifications, standards and descriptions often specify mandatory product attributes. Not applicable to this alloy. The alloy may be forged at F down to F prior to the hardening heat treatment or carburizing. Following carburizing of heavy sections a reheat at F will enhance both case and core properties of the alloy.
Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package? Tempering of heat treated and water quenched parts not carburized is done at F to Aatm with greater hardness the lower the tempering temperature. Create a free website or blog at WordPress.
Sometimes the replacement standard or specification contain different product requirements. AISI is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened part.
Consult the alloy supplier for information as to temperatures. Hot working may be accomplished prior to hardening or carburizing. Click Here to Email Me. 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 The alloy may be welded by conventional methods, usually gas or arc welding.
40S83 Stud Assemblies – Knurled Cylindrical Head
This case-hardening will result in good wear characteristics. By continuing to use this website, you agree to their use.
asttm Machining is done prior to carburizing to within as close a tolerance as possible. 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. Carburize at to F in an appropriate carburizing medium and oil quench to harden.
Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F.
Preheating at F aa331 beneficial and subsequent heating after welding is recommended – consult the approved weld procedure for the method used. For Email Marketing you can trust.