ductile iron casting with 100%pressure test, certified by ISO, TUV-PED, BV We ... .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 ... be provided.8, Strong machining capabilities with a hole line of machining equipment, including 4 CNC machining centers. pressure investment casting, ductile iron