17-4 HH1150 Stainless Steel
Stainless steel 17-4 H1150 is stainless steel grade 17-4, also known as 630 alloy, that has been heat treated twice at a temperature between 1140° F and 1160° F for 3.75 hours to 4.25 hours. The steel will become softer than it is in the annealed condition after being treated at such a high temperature.
