ZA 27 - Zinc Aluminum

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

Check out our ZA-27 Material Spotlight blog post!

Mechanical Properties

Material Alloy Elongation   Tensile Strength   Yield Strength (0.2%)   Impact Strength   Shear Strength   Hardness   Process
% in 50mm
PSI x 103
PSI x 103
ft lb
PSI x 103
Brinell (HB)
Zinc Casting Metals
3
61
55
9.4
47
119

Physical Properties

Material Alloy Density   Melting Point (Average +/- 50)   Thermal Conductivity   Coefficient of Thermal Expansion   Electrical Conductivity   Process
lb/in3
°F
BTU/h∙ft∙°F
µin/in°F
%IACS
Zinc Casting Metals
0.181
806
72.5
14.4
29.7

Composition

Zinc Casting Metals
% ZA 27 - Zinc Aluminum
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 04.04.2023