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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Tempering of heat treated and water quenched parts not carburized is done at F to F with greater hardness the lower the tempering temperature. This case-hardening atm result in good wear characteristics. Tempering astn 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 In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts.
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.
Speaking of Precision Blog Sensemaking for the precision machining industry. Hot working may be accomplished prior to hardening or carburizing.
Sometimes the replacement standard or specification contain different product requirements. This alloy may be hardened by heating to F followed sstm a water quench. For Email Marketing you can trust.
Click Here to Email Me. Create a free website or blog at WordPress. Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding. Consult the alloy supplier for information as to temperatures.
Machining is done prior to carburizing to within as close a tolerance as possible. The alloy may be forged at F down to F prior to the hardening heat treatment or asym. Improved carburized case and core properties can be obtained by furnace cooling from carburizing at – F and then reheating to F.
ASTM A | Speaking of Precision Blog
Forming characteristics of alloy are good in the annealed condition. Astj request for an assist always results in a prompt response from the appropriate supplier expert or an answer from PMPA Staff.
Carburize at to F in an appropriate carburizing medium and oil quench to harden. Mean Coeff Thermal Expansion. By continuing to use this website, you agree to their use. Where do you go for an assist when wierd, strange, and unusual specifications appear in a quote package? Preheating at F is beneficial and subsequent heating after astn is recommended – consult the approved weld procedure for the method used.
These specifications, standards and descriptions often specify mandatory product attributes.
8620 Alloy Steels Material Property Data Sheet – Product availability and request a quote
Modulus of Elasticity Tension. AISI is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened a3331. Not applicable axtm this alloy. To find out more, including how to control cookies, see here: This alloy is typically used for carburized parts where a hardened case is desired for wear resistance. The alloy may be welded by conventional methods, usually gas or arc welding. 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 Asfm 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.
ASTM A – 95() Standard Specification for Steel Bars, Alloy, Cold-Finished (Withdrawn )
From there it may be air cooled. Sign up for our Newsletter. Cold working, as with machining, should be done to as close a tolerance as possible before heat treatment or carburizing.