17-4PH Stainless Steel Sheet & Plate (AMS 5604 / UNS 17400) is a premium precipitation-hardening martensitic stainless steel that delivers an excellent balance of high strength, hardness, and corrosion resistance. The “PH” stands for Precipitation Hardening, a heat-treatment process that significantly enhances its mechanical performance. This grade is ideal for demanding engineering, industrial, and structural applications where strength and durability are critical.
Manufactured from a carefully engineered alloy of chromium, nickel, copper, and other elements, 17-4PH stainless steel combines tough mechanical properties with reliable corrosion protection in various environments. It is widely used across industries such as aerospace, chemical processing, automotive, oil & gas, mining, and food processing.
