17-4 H1075 Stainless Steel
Stainless steel 17-4 H1075 is stainless steel grade 17-4, also known as 630 alloy that has been heat treated at a temperature between 1065° F and 1085° F for 3.75 hours to 4.25 hours. After treating the steel at a temperature of 1075° or higher, it will become softer than in the annealed form. On the Rockwell C scale, 17-4 H1075 Stainless Steel has a hardness of 31.
