... Bronze, Copper, and customized material from clients.Material GradeASTM, DIN, GB, BS, JIS, AISI, NF, etcProcessInvestment casting, Sand Casting,Weight0 ... technology specification,surface treatment,quantity, special requirements and etc) Q 3.How about quality of your castings parts? After ... furnace. When ingot is melted in this manner, the metal should be quickly heated to a temperature slightly above ...