This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings. Welding, brazing, or other exposure to temperatures over 800 F (427 C) during fabrication may impair corrosion resistance.
SAE AMS5639C-1972 history
2022SAE AMS5639K-2022 Steel, Corrosion-Resistant, Bars, Wire, Forgings, Mechanical Tubing, Rings and Forging and Ring Stock 19Cr - 10Ni Solution Heat Treated