stainless steel JIS SUS630 Steel: AISI 630 / 17-4PH Equivalent — Precipitation-Hardening Stainless
SUS630 (JIS G4303) is Japan's 17-4PH precipitation-hardening stainless. Full guide: condition H900–H1150, 930–1310 MPa range, AISI 630 equivalent, and aerospace/medical applications.