Flange iron & steel castings 1.Cast iron&cast steel,bronz,Aluminiu 2.ISO9001:2000 3.Sand cast,lost wax casting 4.ASTM,DIN Flange ... OEM serviceMaterial: gray iron, ductile iron, carbon steel, stainless steel, alloy steelProcess: sand casting ,investment casting ,die casting and so onStandard: GB ,ASTM ,DIN ,JISWeight ...