ZINC

LIAN CHANG provides all kinds of die casting parts, we are specialized in brass alloy, aluminum alloy and zinc alloy…etc. We can also provide customized design and manufacturing, please contact us if you need professional die casting.
The zinc alloy materials are Zamak3, ZA8, ZA12 and ZA27.


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 Expansionh(20-100c,um/mm/c)
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(5x10 cycle,MPa)
58.6
47.6
48-57
56.5
-
-
-
-
103.5
-
172.5


Compressive Strength(0.1%m,MPa)
641
414
414-600
600
600
252
199
252
199
269
227



Applications

Lock parts
Furniture parts
Hardware parts
Lighting fixtures
Electronic parts
Bicycle / motorcycle / car spare parts
OEM parts and components according to customers' specifications


Cast to finish
CNC machining;
drilling / tapping / broaching / reaming / sanding / polishing / buffing / blast cleaning / vibrating / thermo-debarring / assembly / packaging / outside chemical finishing and painting