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|
|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|
For additional properties of ZA-27 and other zinc die casting alloys, please visit our technical library.