... grade :600 series model number :17-4PH New offer 17-4PH stainless steel bar 17-4PH (630 stainless )- You choose !!1. Diameter: Ø1'', Ø2 ... composition:C:≤0.07, Si:≤1.0, Mn:≤1.0, P:≤0.04, S:≤0.03, Cr:15.0~17.0 ... PropertiesAlloy 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness ...