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:  BrinellModulus of Elasticity:  psi x 10^6
61 (421)55 (379)1-3105-12511.3

Typical Die Cast Physical Properties
Density:  lb/in^3 (g/cc)Melt Range:  deg F (deg C)Electrical Conduct: %IACSSpecific Heat:  BTU/lb/deg FDie Shrinkage: in/in
0.181 (5.0)708-903 (375-484)29.70.1250.008

Chemical Analysis
Ingot (ASTM B240)25.5-28.0.012-.022.0-2.5.07 max.005 max.005 max.002max-balance
Die Cast (ASTM B86)25.0-28.0.01-.022.0-2.5.075 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.