... edges. It is being used in rolling element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless steel ... paper and textile industries (valves, pumps and bearings).OUR MAIN PRODUCTS:Stainless steel ball:AISI302,304,316,420,4440CBearing steel balls:AISIE52100Carbon ... G40,G25,G18,G16,G14,G12,G10Any further Information,Plz contact us! 8mm High Quality Stainless steel ...