Zinc cast parts are easy to be made and lower cost, compare to other metal material ,such aluminum , iron and copper. If you can use some of aluminum alloy material to process a standard work piece, the part must pass cutting, milling, lathering and cnc machining. This will spend more time and labors on processing it. This cost is very high, so expensive. Even though, you also consider of aluminum die casting process. Its cost is still very high. Since aluminum melt point is so high, at about 800 degrees. In another one, melting aluminum alloy material into aluminum liquid in need of much electricity power. However, zinc alloy melt point is 450 degrees or so, From this point only, the zinc casting parts is best choice. Meanwhile, it has common metal properties, and durable and safety.Â