Aluminum is light in weight, complex to manufacture, has high dimensional stability when used with thin-walled castings, strong corrosion resistance, good mechanical properties, high thermal and electrical conductivity, and still has high strength at high temperatures.

Zinc is the easiest metal to die-cast. It is economical to manufacture small parts, easy to coat, has high compressive strength and plasticity, and has a long casting life. The minimum wall thickness of zinc alloy die-casting parts can reach 0.3mm; the minimum wall thickness of aluminum alloy castings can reach 0.5mm; the minimum casting hole diameter is 0.7mm; the minimum thread pitch is 0.75mm.