... metal part 1. Material:carbon steel,stainless,aluminum alloy 2.Finish:powder coat,zinc plated elevator hardware sheet metal ... , stainless steel, aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining,threadingSurface finishingzinc plating, hot dipped ... machine, CNC bending machine, CNC boring machine, punching machine, Welding robot, powder coat finishing line , ...