Hardness of Common Zinc Alloys
The hardness of zinc alloys can vary depending on the specific alloy composition and the manufacturing process used. Generally, zinc alloys exhibit moderate hardness, making them suitable for various applications, including die casting, galvanizing, and corrosion-resistant coatings.
The following tables provide a list of Brinell hardness (HB) values for common zinc alloys at room temperature (approximately 20°C or 68°F).
| UNS number | Composition | ||
|---|---|---|---|
| AC41A (Zamak 5) | Z35531 | Zn-4Al-1Cu-0.05Mg | 91 |
| AC43A (Zamak 2) | Z35541 | Zn-4Al-2.5Cu-0.04Mg | 100 |
| AG40A (Zamak 3) | Z33520 | Zn-4Al-0.04Mg | 82 |
| AG40B (Zamak 7) | Z33523 | Zn-4Al-0.015Mg | 80 |
| Copper-hardened rolled zinc | Z44330 | Zn-1.0Cu | 52 - 60 |
| ILZRO 16 | Zn-1.25Cu-0.2Ti-0.15Cr | 113 | |
| Korloy 2684 | Zn-22Al | 70 - 85 | |
| Rolled zinc | Z21210 | Zn-0.08Pb | 42 |
| Rolled zinc | Z21220 | Zn-0.06Pb-0.06Cd | 43 |
| Rolled zinc | Z21540 | Zn-0.3Pb-0.03Cd | 47 |
| Rolled zinc alloy | Z45330 | Zn-1.0Cu-0.01Mg | 61 - 80 |
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018.