... .com, Steel, Ductile Iron, Grey Iron, Aluminum, Bronze, Copper, Brass, and customized material from clients.Material GradeASTM, DIN, GB, BS, ... . While gray cast iron is relatively brittle by comparison with steel, ductile iron is not. In fact, ductile iron has strengths ... tool, and other industries.Machinabilty advantages of continuously cast ductile iron bars over carbon steel bars are the primary ...