... casting OEM service boiler parts1) Materials: grey iron, ductile iron, malleable iron,heat resistant iron, carbon steel, stainless steel, aluminum, ... permanent mold casting, forged parts,5) Manufacturing equipment (foundry used): cupola, electric furnace, resin-bonded, dry ... normal lathe, line cutter etc.6) Testing equipment (foundry used): elongation tester, hardness tester, metallographic microscope, ...