|
PROPERTIES OF ZINC AND ALUMINIUM
ALLOYS
TYPICAL MECHANICAL PROPERTIES
| ALLOY |
ZAMAK 3 |
ZAMAK 7 |
ZA-8 |
ZA-12 |
ZA-27 |
A360 |
A380 |
A383 |
Tensile Strength
(psi x 10) |
41 |
41 |
54 |
58 |
61 |
46 |
47 |
45 |
Yield Strength
(0.2% offset)
(psi x 10) |
- |
- |
42 |
46 |
53 |
25 |
24 |
22 |
Elongation
(% in 2") |
10 |
13 |
8 |
6 |
2.75 |
5.0 |
3.5 |
3.5 |
Shear Strength
(psi x 10) |
31 |
31 |
40 |
43 |
47 |
29 |
30 |
- |
Hardness
(Brinell) |
82 |
80 |
105 |
105 |
115 |
75 |
80 |
75 |
PHYSICAL PROPERTIES
| ALLOY |
ZAMAK 3 |
ZAMAK 7 |
ZA-8 |
ZA-12 |
ZA-27 |
A 360 |
A 380 |
A 383 |
Density
(lb./cu. in) |
0.240 |
0.240 |
0.227 |
0.218 |
0.181 |
0.095 |
0.098 |
0.098 |
| Melting Point (F) |
728 |
727 |
759 |
810 |
903 |
1105 |
1100 |
1080 |
| Electrical Conductivity (%IACS) |
27 |
26 |
28 |
28 |
30 |
30 |
20 |
20 |
Coefficient of Thermal
Expansion
(68-212F)
(U in/in/F) |
15.2 |
15.2 |
12.9 |
13.4 |
14.4 |
11.6 |
12.2 |
11.5 |
Die Shrinkage
(in/in) |
0.005 |
0.005 |
0.007 |
0.007 |
0.008 |
0.005 |
0.005 |
0.005 |
CHEMICAL SPECIFICATIONS (Per ASTM) (% by
weight)
| ALLOY |
Zamak 3 |
Zamak 7 |
ZA-8 |
ZA-12 |
ZA-27 |
A 360 |
A 380 |
A 383 |
| Al |
3.9-4.3 |
3.9-4.3 |
8-8.3 |
10.5-11.5 |
25-28 |
Balance |
Balance |
Balance |
| Mg |
.02-.05 |
.01-.02 |
.015-.030 |
.015-.030 |
.010-.020 |
.6 |
.1 |
.1 |
| Cu |
.10 |
.75-1.25 |
.8-1.3 |
.5-1.25 |
2-2.5 |
.4 Max |
3-4 |
3-4 |
| Fe |
.075 |
.050 |
.075 |
.075 |
.075 |
2 Max |
2 Max |
1.3 Max |
|
Ni |
- |
.005-020 |
- |
- |
- |
.5 |
.5 |
.3 |
| Cd |
.003 |
.002 |
.003 |
.003 |
.003 |
- |
- |
- |
| Si |
.003 |
.003 |
.003> |
.003 |
.003 |
9-10 |
7.5-9.5 |
10.5-12 |
| Mn |
- |
- |
- |
- |
- |
.35 |
.5 Max |
.5 Max |
| Pb |
.004 |
.002 |
.004 |
.004 |
.004 |
- |
- |
- |
| Zn |
Balance |
Balance |
Balance |
Balance |
Balance |
.5 Max |
3 Max |
3 Max |
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