... .Material:alloy steel,SS 2.Process:Investment casting 3.Used:Power Casting Impeller,Pump impeller,Stainless Steel Impeller Pump ... 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 ...