... steel, stainless steel, chrome steel, cold rolled sheet, bearing steel, brass, copper, bronze, chrome copper, mold steel ,and so onSurface treatmenthardening ... MethodTurning, Stamping, Die/pressure casting, CNC processsing, Punching, Riveting, Bending, Cutting, Welding, Threading, Grinding, Milling, Machining, Drilling, Assembly, etc Production capacity30,000 ...