ductile iron casting with 100%pressure test, certified by ISO, TUV-PED, BV We manufacture customized products according to individual client's ... pouring, cutting.2, Materials: carbon steel, alloy steel, cast iron, cast steel, pig iron, grey iron, ductile cast iron and so on.3, Has obtained international approvals ... , including 4 CNC machining centers. pressure investment casting, ductile iron