Zinc Alloy Standard Composition/ Physical Properties
Zinc Alloy Standard Composition
| Designation | No.2(%) | No.3(%) | No.4(%) | No.5(%) | No.7(%) | ZA-8(%) | ZA-12(%) | ZA-27(%) |
|---|---|---|---|---|---|---|---|---|
| Aluminum (Al) | 3.9-4.3 | 3.9-4.3 | 3.9-4.32 | 3.9-4.3 | 3.9-4.3 | 8.2-8.8 | 10.8-11.5 | 25.5-28.0 |
| Magnesium(Mg) | 0.025-0.05 | 0.025-0.05 | 0.025-0.05 | 0.03-0.06 | 0.010-0.02 | 0.020-0.030 | 0.020-0.030 | 0.012-0.020 |
| Copper (Cu) | 2.6-2.9 | 0.10max | 0.3-0.4max | 0.75-1.25 | 0.10max | 0.8-1.3 | 0.5-1.2 | 2.0-2.5 |
| Lead (Pb) | 0.004max | 0.004max | 0.004max | 0.004max | 0.002max | 0.005max | 0.005max | 0.005max |
| Cadmium(Cd) | 0.003max | 0.003max | 0.003max | 0.003max | 0.002max | 0.005max | 0.005max | 0.005max |
| Tin(Sn) | 0.002max | 0.002max | 0.002max | 0.002max | 0.001max | 0.002max | 0.002max | 0.002max |
| Iron(Fe) | 0.075max | 0.075max | 0.075max | 0.075max | 0.075max | 0.065max | 0.065max | 0.072max |
| Nickel(Ni) | - | - | - | - | 0.005-0.020 | - | - | - |
| Zinc(Zn) | Balance Remaining Amount |
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Zinc Alloy Physical Properties
| Designation | No.2(%) | No.3(%) | No.4(%) | No.5(%) | No.7(%) | ZA-8(%) | ZA-12(%) | ZA-27(%) |
|---|---|---|---|---|---|---|---|---|
| Density(g/cm) | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.3 | 6 | 5 |
| Melting Range(C) | 379-390 | 381-387 | 380-386 | 380-386 | 381-387 | 375-404 | 377-432 | 376-484 |
| Electrical Conductivity(%IACS) | 25 | 27 | 26-27 | 26 | 27 | 27.7 | 28.3 | 29.7 |
| Thermal Conductivity(100c,W/m.k) |
104.7 | 113 | 180.9-113.0 | 108.9 | 11.3 | 114.7 | 116.1 | 125.5 |
| Coefficient of Thermal Expansion | 27.8 | 27.4 | 27.4 | 27.4 | 27.4 | 23.3 | 24.2 | 26 |
| (20-100c,um/mm/c) | ||||||||
| Specific Heat(J/kg.k) | 418.7 | 418.7 | 418.7 | 418.7 | 418.7 | 435.4 | 448 | 534.4 |
| Die Shrinkage(mm/mm) | 0.006 | 0.006 | 0.007 | 0.006 | 0.006 | 0.007 | 0.0075 | 0.008 |
Advantages of Zinc Alloy Precision Castings
- Product can achieve higher dimension precision.
- Suitable for complicated shapes, castings that are difficult to process, and can greatly reduce processing costs.
- Achieve precise and delicate surfaces that will be beneficial for future surface processing treatments.
- Suitable for low volume high diversity.
Advantages of Zinc Alloy Die-Casting
- Product can achieve higher dimension precision.
- Molds can achieve more than 200,000 uses in one lifespan.
- Can reduce post-processing machining ratios.
- Suitable for mass production.
