... 20KH13 1.Dia 50-1200mm 2. UT: SEP1921-84 3. stainless steel bar 2Cr13/X20Cr13/1.4021/420/42010 ... . Martensitic stainless steel.ApplicationsDental and surgical instruments, cutlery, pump shafts, plastic molds and dies, steel balls, and various hand tools, pump ... process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, Grain size, heat ...