ZA 27

ZA-27, or zinc aluminum alloy, contains significantly more aluminum than the Zamak group of alloys. The number 27 represents the approximate percentage of aluminum.

  • ZA-27 has the highest aluminum content, highest strength, highest melting point, and lowest density of the ZA group
  • This zinc alloy exhibits excellent bearing properties, which allow bearings to be designed into the casting of some applications
  • Its relatively high casting temperature requires the cold-chamber process

Mechanical Properties

Material Alloy Tensile Strength   Yield Strength   Impact Strength   Shear Strength   Hardness   Elongation   Process
MPa
MPa
J
MPa
Brinell (HB)
% in 50mm
Zinc
425
376
12.8
325
119
3

Physical Properties

Material Alloy Density   Melting Point   Thermal Conductivity   Coefficient of Thermal Expansion   Electrical Conductivity   Process
g/cm3
°C
W/m K
µm/m°K
%IACS
Zinc
5.00
431
123
26.0
29.7

Composition

Zinc
% ZA 27
Aluminum 25.0-28.0
Copper 2.0-2.5
Magnesium 0.01-0.02
Iron (max) 0.075
Lead (max) 0.006
Cadmium (max) 0.006
Tin (max) 0.003
Nickel (max)
Zinc Bal.
Manganese
Silicon
Other-Metallic
RoHS Compliant

 

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Last updated 11.18.2019