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          17-7 PH/17-4 PH/15-5 PH Forging Precipitation Hardening Stainless Steel
          
           
          Precipitation hardening stainless steel is a type of stainless steel that improves strength and hardness by precipitating alloying elements in the matrix through heat treatment. It can be divided into three types: martensitic, semi austenitic, and austenitic.
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