Thermal Expansion of Common Zinc Alloys
The following table provides a curated list of linear thermal expansion coefficients for common zinc alloys, taken at room temperature (approximately 20°C or 68°F) and 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
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| UNS number | Composition | ||
|---|---|---|---|
| Pure zinc | Z13000 | 99.99 | 39.7 |
| AC41A (Zamak 5) | Z35531 | Zn-4Al-1Cu-0.05Mg | 27.4 |
| AC43A (Zamak 2) | Z35541 | Zn-4Al-2.5Cu-0.04Mg | 27.8 |
| AG40A (Zamak 3) | Z33520 | Zn-4Al-0.04Mg | 27.4 |
| AG40B (Zamak 7) | Z33523 | Zn-4Al-0.015Mg | 27.4 |
| Copper-hardened rolled zinc | Z44330 | Zn-1.0Cu | 21.1 - 34.7 |
| ILZRO 16 | Zn-1.25Cu-0.2Ti-0.15Cr | 27 | |
| Korloy 2684 | Zn-22Al | 22 | |
| Rolled zinc | Z21210 | Zn-0.08Pb | 32.5 |
| Rolled zinc | Z21220 | Zn-0.06Pb-0.06Cd | 32.5 |
| Rolled zinc | Z21540 | Zn-0.3Pb-0.03Cd | 39.9 |
| Rolled zinc alloy | Z45330 | Zn-1.0Cu-0.01Mg | 21.1 - 34.8 |
The thermal expansion values in this table are approximate and can vary depending on the specific composition and processing of each alloy.
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018.