... .ISO9001, ISO14001, GB/T28001certifications 3.Factory supply directly Forged 1Cr18Ni9Ti/321 stainless steel 1.Good quality and price for 10 year's ... material: Carbon steel, Duplex and super duplex steel, alloy QT steel, high temperature steel, case hardened steel, Stainless steel, Titanium and its alloy, Die steel, etc Plastic ...