Technical Datasheets for Stainless Steel - Precipitation Hardening Stainless Steel - Precipitation Hardening 1.4542 (17/4 & 630) Bar 15/5 PH AMS 5659 Precipitation Hardening Stainless Steel 15/5 PH AMS5643-5604-5622 1.4542 AMS5643 AMS5604 AMS5622 1.4542