Stainless Steel 630 (17-4PH) Grade Data Sheet
Grade 630 (17-4PH) Grade 630 martensitic precipitation hardening stainless steel has a combination of high hardness and strength after suitable heat treatment. It also has similar corrosion and heat resistance to Grade 304. The terms "Type 630" and "17-4PH" refer to the same grade. The great benefit of this grade (and of other precipitation ...