https://saemobilus.sae.org/standards/ams6532f-steel-bars-forgings-31cr-115ni-135co-12mo-021-025c-vacuum-melted-normalized-overaged-precipitaiton-hardenable
AMS6532F: Steel, Bars and Forgings 3.1Cr - 11.5Ni - 13.5Co - 1.2Mo (0.21 - 0.25C) Vacuum Melted,...