MaterialDuctile Iron,Website:http://www.hh-casting.com, Grey Iron, Aluminum, Stainless Steel, Steel, Bronze, Copper, ... GradeASTM, DIN, GB, BS, JIS, AISI, NF, etcProcessInvestment casting, lost wax castingWeight0.1kg- 70kgToleranceCT 4-6 grade, and based ... AdvantagesSince its development in the mid-1940s, ductile iron casting production has grown dramatically. Ductile iron has engineering properties ...