17-7PH Stainless Steel
17-7PH (UNS S17700) is a precipitation hardening stainless steel offering high strength, good corrosion resistance, and minimal distortion upon heat treatment. The alloy contains 17% chromium, 7% nickel, and 1.2% aluminum. It is used extensively in aerospace applications requiring high fatigue strength combined with moderate corrosion resistance.
17-7PH is available in sheet, strip, wire, and bar. Condition A (annealed) provides excellent formability; Condition TH1050 and RH950 develop tensile strength up to 200 ksi through precipitation hardening.
Product Forms & Size Range of 17-7PH
17-7PH sheet and strip is available in thicknesses from 0.001″ to 0.125″ in widths up to 48″ in annealed Condition A for forming and fabrication.
17-7PH bar stock is available in rounds from 0.125″ to 4.000″ diameter and wire from 0.003″ to 0.625″ diameter in Condition A for machining and spring fabrication.
HEAT TREATMENT OF 17-7PH STAINLESS STEEL
17-7PH is heat treated to three principal conditions: Condition A (solution annealed for maximum formability), Condition TH1050 (transformation hardened at 1400°F then aged at 1050°F), and Condition RH950 (refrigerated at -100°F then aged at 950°F for maximum strength up to 200 ksi).
Certified Material for Critical Service
17-7PH stainless steel is supplied as certified material with full mill test reports confirming chemical composition, mechanical properties, and heat treatment compliance, meeting AMS 5528 and AMS 5644 requirements.