Commercial |
Zamak Die Casting Alloys |
ZA Die Casting Alloys |
No.3 |
No.5 |
ZA-8 |
ZA-12 |
| Mechanical Properties |
Ultimate Tensile Strength
As-Cast ksi (MPa) |
41(283) |
48(328) |
54(372) |
59(400)
|
Yield Strength
As-Cast ksi (MPa) |
32 (221) |
39 (269) |
41-43
(283-296)
|
21 (140) |
Compressive Yield Strength
As-Cast ksi (MPa) |
60 (414) |
87 (600)
|
37 (252)
|
39 (269)
|
Elongation
As-Cast % in 2in. (51mm) |
10 |
7 |
6-10 |
4-7 |
Hardness
As-Cast BHN |
82 |
91 |
100-106 |
95-105 |
Shear Strength
As-Cast ksi (MPa) |
31(214) |
38 (262)
|
40 (275)
|
43 (296)
|
Impact Strength
As-Cast ft-lb |
43
|
48 |
24-35 |
15-27 |
Fatigue Strength
As-Cast ksi (MPa) |
6.9 (47.6)
|
8.2 (56.5)
|
15 (103)
|
- - |
Young’s Modulus
psi x 10 6 (GPa) |
- |
- |
12.4 (85.5) |
12 (83) |
| Physical Properties |
Density
lb / in³
(g/cm³) |
0.24
(6.6) |
0.24
(6.6) |
0.227
(6.3) |
0.218
(6.03) |
Melting Range
°F
( °C) |
718-728 (381-387) |
717-727 (380-386) |
707-759 (375-404) |
710-810 (377-432) |
Specific Heat
BTU / lb °F
(J/kg °C) |
0.10
(419) |
0.210
(419) |
0.104
(435) |
0.107
(450) |
Coefficient of Thermal Expansion
µ in / in°F
µ m / m°K |
15.2
(27.4) |
15.2
(27.4) |
12.9
(23.2) |
13.4
(24.1) |
Thermal Conductivity
BTU / ft hr°F
(W / m °K) |
65.3
(113) |
62.9
(109) |
66.3
(115) |
67.1
(116) |
Electrical Conductivity
µ Ω in. |
27 |
26 |
27.7 |
28.3 |
| Poisson’s Ration |
0.30 |
0.30 |
0.30 |
0.30 |
Commercial ANSI/AA |
Zamak Die Casting Alloys |
| No.3 |
No.5 |
No.3 |
No.5 |
| Resistance to Hot Cracking (a) |
1 |
2 |
2 |
3 |
| Pressure Tightness |
1 |
2 |
3 |
3 |
| Casting Ease |
1 |
1 |
2 |
3 |
| Part Complexity |
1 |
1 |
2 |
3 |
| Dimensional Accuracy |
2 |
2 |
2 |
3 |
| Dimensional Stability |
3 |
3 |
2 |
2 |
| Corrosion Resistance |
2 |
4 |
5 |
2 |
| Resistance to Cold Defects (b) |
2 |
2 |
2 |
3 |
| Machining Easy & Quality (c) |
1 |
1 |
2 |
3 |
| Polishing Ease & Quality |
1 |
1 |
2 |
3 |
| Electroplating Ease & Quality (d) |
1 |
1 |
1 |
2 |
| Anodizing (Protection) |
1 |
1 |
1 |
2 |
| Chemical Coating (Protection) |
1 |
1 |
2 |
3 |
| (a) |
The ability of alloy to resist formation of cold defects; for example, cold shuts, cold cracks, non-fill “woody”areas, swirls, etc. |
| (b) |
Ability of alloy to withstand stresses from contraction while cooling through the hot-short or brittle temperature range. |
| (c) |
Composite rating based on ease of cutting, chip characteristics, quality of finish, and tool life. |
| (d) |
Ability of the die casting to take and hold an electroplate applied by present standard methods. |
