AM 350® Precipitation Hardening Alloy (S35000) is a chromium-nickel-molybdenum precipitation hardening stainless steel used for applications requiring high strength and excellent weldability along with corrosion resistance.

The S35000 alloy has been available for many years and has found application in a variety of aerospace applications and especially in edge welded bellows applications that require high strength. Non-aerospace applications include use in precision seals, in couplings for semiconductor processing equipment, and in high vacuum systems. AM 350® precipitation hardening alloy may be formed in a soft austenitic condition and hardened to a high strength level by low temperature heat treatments. The low temperature allows minimum distortion compared to conventional quench and temper hardening processes.