ASTM ASME 17-7 PH Stainless Steel Pipes & Tubes

ASTM/ASME 17-7 PH Stainless Steel Pipes & Tubes are semi-austenitic precipitation-hardening (UNS S17700) products conforming to ASTM A312/A213/A790 standards, featuring a precision-engineered chromium (16-18%), nickel (6.5-7.75%), and aluminum (0.75-1.5%) composition for exceptional strength (up to 1450 MPa yield in TH1050 condition) and corrosion resistance approaching 304 stainless. This high-performance alloy achieves its optimal properties through a unique three-stage heat treatment process (solution annealing, conditioning, and aging), making it particularly suitable for aerospace springs, surgical instruments, and pressure vessels where ultra-high strength and fatigue resistance are required. The material offers superior toughness at both cryogenic and elevated temperatures (up to 315°C/600°F continuous service), with excellent resistance to stress corrosion cracking and oxidation. Typical applications include aircraft hydraulic tubing, nuclear reactor components, and high-stress fasteners where the combination of 17-7 PH's mechanical properties, formability in annealed condition (Condition A), and subsequent age-hardening capabilities provide engineers with unparalleled design flexibility for critical components. Available in multiple metallurgical conditions (RH950, TH1050, etc.) to meet specific performance requirements while maintaining corrosion resistance comparable to austenitic grades in most environments.