... are raw casting, machining, Surface treatment, Surface finish3.We have a strict quality control system4.We can give the most competitive ... best service for do business with you ItemDescriptionMaterialTechnical Process1Ductile ironcastingsASTM A 536-Gr.60-40-18,65-45-12,80-55 ... -No.20,25,30,35,40,45,50;ASTM A126-Class A, Class B, Class C;DIN- GG10 GG15 GG20 GG25 GG30 GG35 GG40 ...