... system certificate:ISO9001:2008 Type: Mould Products Stamping die mould Dongguan Richhong metal Co. Ltd has long ... steel, aluminum alloy; Brass alloy; Tinplate, copper; Stannum bronze; Silicon bronze; Zinc alloy; Gray iron; Ductile iron; Malleable iron; ... , spot or seam welding, spinning, forging, sand casting, die casting, investment casting, etc.Surface treatmentPolishing, zinc plating, nickel ...