Materials database

The most widely used precipitation-hardening stainless steel. Combines high strength (up to 1310 MPa UTS) with corrosion resistance comparable to 304. Delivered solution-annealed and hardened by simple low-temperature aging. Used in aerospace, medical, oil & gas, and nuclear applications.

Precipitation-hardening martensitic stainless steel — the highest-strength stainless in common use. Solution anneal at 1040°C then age at 480-620°C for UTS >1300 MPa. Corrosion resistance similar to 304. Cu+Nb precipitation hardening. Trade names include 17-4PH, SUS630. Used for aerospace structural parts, turbine blades, valve components, nuclear waste casks, medical instruments, and oil/gas equipment.

Semi-austenitic precipitation-hardening stainless steel equivalent to AISI 631 / 17-7PH. Hardens through aluminum-induced precipitation during aging. Can be supplied in various conditions (A, TH1050, CH900, RH950). Combines high strength (up to 1300 MPa) with good corrosion resistance and formability in the annealed condition. Used for aerospace components, flat springs, diaphragms, surgical instruments, and high-performance fasteners.