... CARBON STEEL , ALLOY Water Pump Impeller,Pump Shell,Sand Casting PartsPump impeller as the part of different pumps, we ... propeller, pump parts, valves and so on! Sand casting have the clear advantage such as extreme versatility, cost- ... ASTM, AISI, BS, DIN, JIS, NF .Process: Sand casting (resin sand casting,green sand casting).Machining: Turning, milling, drilling, grinding, threading, CNC machining ...