The four main materials used in die cast parts are Aluminum, Zinc, Magnesium and Brass respectively. The following chart will show the similarities and differences of the four main die cast materials.
Aluminum |
Brass |
Magnesium |
Zinc |
|
| Tensile strength, psi x 1000 |
47 | 55 |
34 |
41 |
| Yield strength, psi x 100 (0.2 pct offset) |
23 |
30 | 23 | — |
| Shear strength, psi x 1000 |
28 | 37 | 20 | 31 |
| Fatigue strength, psi x 1000 |
20 | 25 | 14 |
7 |
| Elongation, pct in 2 in. |
3.50 |
15 |
3.0 | 10 |
| Hardness (Brinell) | 80 | 91 | 63 | 82 |
| Specific gravity |
2.71 | 8.30 | 1.80 | 6.60 |
| Weight, lb/cu. in. |
0.098 | 0.305 |
0.066 |
0.24 |
| Melting point (liquid), °F |
1100 |
1670 | 1105 | 728 |
| Thermal conductivity, CG5 |
0.23 | 0.21 | 0.16 | 0.27 |
| Thermal expansion, in./in./°F x 106 |
12.1 | 12.0 | 15.0 |
15.2 |
| Electrical conductivity, pct of copper standard |
27 | 20 | 10 | 27 |
| Modulus of elasticity, psi x 106 |
10.3 | 15 |
6.5 |
— |
| Impact strength (Charpy), ft/lb |
3.0 |
40 | 2.0 | 43.0 |