Historical
SAE AMS 5643V-2018
Steel, Corrosion-Resistant, Bars, Wire, Forgings, Mechanical Tubing, and Rings 16Cr - 4.0Ni - 0.30Cb Nb) - 4.0Cu Solution Heat Treated, Precipitation Hardenable
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash welded rings up to 8.0 inches (203 mm) in diameter or least distance between parallel sides, and stock of any size for forging, flash welded rings, or heading (see 8.8).
Society of Automotive Engineers [sae]