... 316L, 420, 440C 0.6mm-100mm stainless steel ball G10-1000 Stainless steel balls have similar mechanical properties as ... used in rolling element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless ... industries (valves, pumps and bearings). Production process:Drawing, Heading, Flashing, Heat-treatment, Grinding, Lapping1, Lapping2, Inspection, Packing.OEM is ...