... process according to the customer's drawing sand castingsand casting ductile iron 450-101.Material:grey ironGG15,GG20,GG25 ... ,GG30,ductile iron 400-18,450-10,500-7 by vacuum casting,sand casting,lost foam casting ... Standard:JIS,GB,DIN,GOST,ASTM,ISO Proces:sand casting Certification:ISO9001:2008Packing and Shipping 1, Standard ... have a foundry and a machining shop. sand casting ductile iron