... SAND,PRECISION/INVESTMETN CASTING OEM SERVIC grey iron sand casting mechanical part 1.We are manufacturer and exporter in ... casting parts. Material can be reached cast iron,grey iron,ductile iron,steel,carbon steel,stainless steel,copper,brass,bronze ... Vessel parts etc.. 2.Product instruction: • Material:grey iron,ductile iron,steel casting,stainless steel, • Process:sand casting,precision/investment ...