... steel, iron, aluminum alloy, red copper, brass ect SHEET METAL: Certificate: ISO9001-2003; TS/IS016949-2009 1) Material: stainless ... aluminum alloy, red copper, brass, bronze alloy are available.(2) Metal processing: stamping, deep drawing, spot or seam welding, spinning ... experienced of OEM manufacturer for various kinds of sheet metal parts.(6) Specification: according to drawings and samples ...