Historical
SAE AMS 5659R-2015 (SAE AMS5659R-2015)
Steel, Corrosion-Resistant, Bars, Wire, Forgings, Rings, and Extrusions 15Cr - 4.5Ni - 0.30Cb (Nb) - 3.5Cu
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, flash welded rings, and extrusions in the solution heat treated condition (See 8.3), and stock for forging, flash welded rings, or extruding.
Society of Automotive Engineers [sae]