APPLICATION: Primarily for parts with sections 0.50 in. or less in thickness at the time of heat treatment which require a through-hardening steel capable of developing hardness as high as Rockwell C 50 when properly hardened and tempered and also parts of greater thickness but requiring proportionately lower hardness.
SAE AMS6382F-1967 history
1970SAE AMS6382S-2023 Steel, Bars, Forgings, Rings, and Stock for Forging or Flash Welded Rings Aircraft Quality 0.95Cr - 0.20Mo (0.38 - 0.43C) (4140) Annealed