... -ferrous, grey iron, ductile cast iron and so on3.Process: wax injection, wax welding, dipping, sand-coating, shell-making, dewaxing, cleaning, pouring, cutting ... -ferrous, grey iron, ductile cast iron and so on3.Process: wax injection, wax welding, dipping, sand-coating, shell-making, dewaxing, cleaning, pouring, cutting ...