ductile Iron casting Ductile iron GGG40/50 OEM casting supplier More than 25 years professional casting experience A;Material:ductile iron casting,GGG40/50/60 B;We has ... cast iron,Grey cast iron2SandGreen sand,sodium silicate sand 3MachineLathe,CNC,Drilling machine,Milling machine,Boring machine,Planing machine 4ProcessSand Casting 5Min ...