sand casting iron machinery casting part ISO9001:2000 Material:ductile Iron,gray iron,steel Process:sand casting OEM foundry casting sand casting iron machinery casting part 1)Material:grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC machining 2)Weight:5-1000kgs 3)Process:sand casting,Vacuum casting and lost foam casting sand casting ductile iron construction machinery sprocket wheel 1)Material:steel,grey iron,ductile iron by vacuum casting,sand casting,lost foam casting or CNC machining 2)Weight:5-100kgs 3)Process:sand casting,Vacuum casting and lost foam casting our advantage: 1) strong enginnering team make high quality 2) OEM service in casting 3) ISO9001:2000 quality control 4) all standard and special size are available with drawing 5) own test equipment and professional casting mould development 6) perfect service 7) OEM supplier,we have a foundry and a machining shop.