sand casting construction machinery sprocket wheel ISO9001:2008 Material:Iron,steel,alloy Process:sand casting OEM casting machinery parts1.Material:grey ironGG15, ... ,GG25,GG30,ductile iron 400-18,450-10,500-7,steel,alloy by vacuum casting,sand casting,lost foam casting and CNC ... supplier,we have a foundry and a machining shop. casting steel machinery wheel