Zinc alloy features
| International Standard Compositions of Zinc Die-casting Alloys | ||||||||
| 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 |
Balance |
Balance |
Balance |
Balance |
Balance |
Balance |
Balance |
| Physical Properties of Zinc Alloys | ||||||||
| 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 |
6.0 |
5.0 |
|
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 |
26.0 |
|
Specific Heat(J/kg.k) |
418.7 |
418.7 |
418.7 |
418.7 |
418.7 |
435.4 |
448.0 |
534.4 |
|
Die Shrinkage(mm/mm) |
0.006 |
0.006 |
0.007 |
0.006 |
0.006 |
0.007 |
0.0075 |
0.008 |
| Mechanical Properties of Zinc Alloys | |||||||||||
| Designation |
No.2(%) |
No.3(%) |
No.4(%) |
No.5(%) |
No.7(%) |
ZA-8(%) |
ZA-12(%) |
ZA-27(%) |
|||
|
Meehanical Properties |
Die Cast |
Die Cast |
Die Cast |
Die Cast |
Die Cast |
Die Cast |
Sand Cast |
Die Cast |
Sand Cast |
Die Cast |
Sand Cast |
|
Ultimate Tensile Strength(Mpa) |
359 |
283 |
317 |
331 |
283 |
372 |
248-276 |
400 |
276-317 |
421 |
400-440 |
|
Impact Strength(J) |
47 |
58 |
61 |
65 |
58 |
42 |
20 |
28 |
25 |
- |
47 |
|
Elongation(%) |
7 |
10 |
7 |
7 |
13 |
6-10 |
1-2 |
4-7 |
1-3 |
1-3 |
3-6 |
|
Hardness(HB) |
100 |
82 |
92 |
91 |
80 |
95-110 |
80-90 |
95-115 |
90-105 |
105-125 |
110-120 |
|
Shear Strength(MPa) |
317 |
214 |
214-262 |
262 |
262 |
275 |
- |
275 |
- |
296 |
255 |
|
Yield Strength(0.2%,MPa) |
- |
- |
221-269 |
- |
- |
290 |
200 |
317 |
207 |
365 |
365 |
|
Fatigue Strength Rotary Bend |
58.6 |
47.6 |
48-57 |
56.5 |
- |
- |
- |
- |
103.5 |
- |
172.5 |
|
Compressive Strength |
641 |
414 |
414-600 |
600 |
600 |
252 |
199 |
252 |
199 |
269 |
227 |
The advantages of zinc alloy die-casting mold
．Products available to higher dimensional accuracy
．Die life of up to more than 20 million times
．Can reduce the proportion of post-processing mechanism
．Suitable for mass production
Features and Benefits of zinc alloy die-casting products
．Excellent mechanical value
．Finished dimensions of high stability and accuracy good ( Up to 0.03 mm )
．With excellent surface quality, to avoid additional surface treatment program
．Thin sections of high tensile strength and excellent
．Low production costs
．Through the hot chamber casting with a high production rate
．Lower investment cost through simple production process
．Frame mode and low cost
．Flexible production speed: low speed, in general, or high-speed production rate is possible
．Excellent anti-corrosion characteristics
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