Precipitation Hardening Stainless Steel Precipitation hardening stainless steel was developed by the United States Steel Corporation in the 1940s. It has high strength after precipitation hardening heat treatment, plasticity and corrosion resistance is superior to other stainless steel. The most well-known precipitation hardening steel is 17-4 PH. Description Inquiry Contents [hide] Precipitation Hardening Stainless Steel  … Continue reading Precipitation Hardening Stainless Steel