13Cr-8Ni Austenitic Stainless (var. 18)

A precipitation-hardened austenitic stainless steel combining 13% chromium with 8% nickel, 2.1% aluminum, and molybdenum additions to achieve high strength while maintaining corrosion resistance and toughness. This material bridges martensitic and austenitic stainless families, offering engineers a solution for applications demanding both exceptional strength and resistance to corrosive environments where conventional austenitic grades (300-series) would be too soft or where martensitic grades lack sufficient corrosion resistance. The aluminum addition enables age-hardening, making it particularly suited to aerospace, petrochemical, and high-performance engineering applications where weight savings and reliability in harsh conditions are critical design drivers.