Zamak 5
Zamak 5 (ASTM AC41A) or Zinc Alloy 5, is the most widely used zinc alloy in Europe.
- It has a higher copper content than Zamak 3, which results in higher strength
- It has less ductility (decreased elongation) than Zamak 3
- Designers must keep in mind that this reduction in ductility can affect formability during secondary operations such as bending, riveting, swaging, or crimping operations
- Because of the wide availability of Zamak 3, component engineers often strengthen components by design modifications instead of using Zamak 5
- When a measure of tensile performance is needed, Zamak 5 castings are recommended.
- Zamak 5 is more readily plated, finished, and machined than Alloy 3
Mechanical Properties
Physical Properties
Composition
| Zinc Casting Metals | |
|---|---|
| % | Zamak 5 |
| Aluminum | 3.5-4.3 |
| Copper | 0.75-1.25 |
| Magnesium | 0.03-0.08 |
| Iron (max) | 0.1 |
| Lead (max) | 0.005 |
| Cadmium (max) | 0.004 |
| Tin (max) | 0.003 |
| Nickel (max) | |
| Zinc | Bal. |
| Manganese | |
| Silicon | |
| Other-Metallic | |
| RoHS Compliant | ✓ |
