Pump Casing Centrifugal Pump Material: Ductile Iron and Grey Iron Process: Sand casting,CNC Machining Hydro-test be made. Pump ... is Ductile Iron and Grey Iron, Alum-Bronze etc.2.We cast them by Resin Sand Casting process. Then machine them ... Carbon Steel, Alloy Steel, Ductile Iron, Grey Iron, Copper, Aluminum Bronze, Malleable Iron etc.2) Process: Investment Casting, Sand Casting (Resin Sand ...