The price of zinc alloy and aluminum alloy is similar. If the structure and die-casting process allow, of course, it is more cost-effective to use aluminum alloy. The specific gravity of zinc alloy is about 2.5 times that of aluminum alloy, and the price is comparable, so the material cost of zinc alloy is two or three times more expensive than aluminum alloy. Nowadays, many companies want to replace zinc alloy with aluminum alloy in order to save cost, but some of them cannot be replaced because the strength, hardness and molding performance of zinc alloy are much better than aluminum alloy. If you want to polish the surface of your products and require high quality appearance, you have to use zinc alloy. Aluminum alloy material is difficult to achieve high surface quality requirements, because aluminum alloy die-casting performance is poor, in the product surface easy to product a lot of pores, after plating out the surface quality is very poor.

Zinc alloy die-casting performance is better, the advantages are also more, zinc alloy melting point is low, the solidification temperature range is small, easy to fill the molding, shrinkage tendency is small, can die-cast complex shape, thin-walled precision parts, casting surface is smooth, high dimensional accuracy; casting temperature is low, mold life is long, not easy to stick mold, not corrosive mold. And the room temperature mechanical properties of zinc alloy are also high, especially the pressure resistance and wear resistance are very good, zinc alloy die casting can well accept a variety of surface treatment, such as electroplating, spraying, painting, etc..

The most serious disadvantage of zinc alloy is the aging phenomenon, volume up, strength reduction, too much time will lead to deformation of die castings or even shattering, which is the main reason why the use of zinc alloy is limited. Aluminum alloy is much better than zinc alloy in terms of performance, with good die-casting performance, electrical and thermal conductivity, cutting performance is also good. The disadvantages are also obvious: the alloys of the aluminum-silicon series tend to stick to the mold, are corrosive to the metal crucible, have a large volume shrinkage, and are prone to shrinkage. At the same time, because they have different effects on the mold, so generally speaking, the price of the molds used for zinc alloy and aluminum alloy die-casting will be different, zinc alloy die-casting is not easy to stick to the mold, does not corrode the mold, so the price of the molds used for zinc alloy die-casting will be cheaper, while aluminum alloy die-casting is easy to stick to the mold, corrosive to the metal crucible and other reasons, the price of the molds needed will be higher.




 

 


 

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