... steel,Kovar,Copper-Nickel-Zinc Alloy,Iron nickel alloyProduction process:Stamping,Forming,Cutting,Punching,Positioning,Sintering,Welding,Plating,etc. Surface Treatment: ... polishing,electroplate,electroless plating,electrolytic,passivation,etc.Plating Type:Nickel Plating,Tin Plating,Zinc Plating,Gold plating,Coating Black,Color ...