... part GG20 2.CNC Machining 3.Technics:Green sand casting 4.Make by your design 5.Best service sand casting1 ... process: Green sand casting,Shell sand casting,resin sand casting,auto sand casting line2) Material:----Grey iron,GG15,GG20,GG25,GG30Ductile iron GGG40 GGG50,GGG60,GGG70 ... EN 1596 EN1563,ASTM A159,and etc3)Molding: Hand made/Half auto made Auto casting ...