11Cr-10Ni Austenitic Stainless (var. 17)

An austenitic stainless steel with 11% chromium and ~10% nickel, strengthened by significant aluminum and titanium additions (~0.4% each) and elevated carbon content (~0.14%). This composition positions it as a precipitation-hardening variant designed to deliver higher strength than conventional 300-series austenitic stainless steels while maintaining the corrosion resistance and toughness of the austenitic family. It is used in aerospace and high-temperature applications where elevated strength, thermal stability, and corrosion/oxidation resistance are simultaneously required—such as jet engine compressor components, exhaust systems, and chemical processing equipment operating under thermal cycling. The aluminum and titanium additions enable age-hardening response, making this alloy competitive with martensitic precipitation-hardeners but with superior ductility and corrosion performance in aggressive environments.