ZA-27 is the strongest of all the ZAMAK and ZA alloys with a reported yield strength of 55 ksi. It is also the lightest alloy available and has excellent bearing and wear performance. Additional care is needed when casting this alloy to ensure a sound casting. It may also need a stabilization heat treatment if tight dimensional tolerances are required. ZA-27 is not recommended for plating. When brute strength or wear resistant properties are needed, ZA-27 has demonstrated extraordinary performance. This alloy along with ZA-12 must be cast in a cold chamber die casting machine due to the higher aluminum content and higher melting temperature.
Typical Die Cast Mechanical Properties
| UTS: ksi (MPa) | Yield Strength: ksi (MPa) | Elongation: % | Hardness: Brinell | Modulus of Elasticity: psi x 10^6 |
| 61 (421) | 55 (379) | 1-3 | 105-125 | 11.3 |
Typical Die Cast Physical Properties
| Density: lb/in^3 (g/cc) | Melt Range: deg F (deg C) | Electrical Conduct: %IACS | Specific Heat: BTU/lb/deg F | Die Shrinkage: in/in |
| 0.181 (5.0) | 708-903 (375-484) | 29.7 | 0.125 | 0.008 |
Chemical Analysis
| | Al | Mg | Cu | Fe | Pb | Cd | Sn | Ni | Zn |
| Ingot (ASTM B240) | 25.5-28.0 | .012-.02 | 2.0-2.5 | .07 max | .005 max | .005 max | .002max | - | balance |
| Die Cast (ASTM B86) | 25.0-28.0 | .01-.02 | 2.0-2.5 | .075 max | .006 max | .006 max | .003 max | - | balance |
Recommended Downloads
For additional properties of ZA-27 and other zinc die casting alloys, please visit our technical library. 