... :carbon steel,stainless,aluminum alloy 2.Finish:powder coat,zinc plated elevator hardware sheet metal part1.Strictly quality control by ... , garage, hardware, crane partsMaterialcarbon steel, stainless steel, aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining,threadingSurface finishingzinc plating ... rolling machine and so on. elevator hardware sheet metal part