ZA 8

ZA-8, or zinc aluminum alloy, contains significantly more aluminum than the Zamak group of alloys. ZA-8 contains approximately 8.4% aluminum and is the only ZA alloy that can be hot-chamber die cast, an important consideration when selecting a material for a component. 

  • ZA-8 has excellent finishing and plating characteristics and was originally developed as a permanent mold alloy
  • It is ideal for decorative applications
  • Although it does not have as good casting characteristics as the other zinc alloys, it offers significantly improved strength, hardness, and creep properties
  • In terms of mechanical performance, ZA 8 has the highest creep strength of any zinc alloy and the highest strength of any hot-chamber die cast zinc alloy

Mechanical Properties

Material Alloy Tensile Strength   Yield Strength   Impact Strength   Shear Strength   Hardness   Elongation   Process
MPa
MPa
J
MPa
Brinell (HB)
% in 50mm
Zinc
374
290
42
275
103
10

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
6.30
390
115
23.3
27.7

Composition

Zinc
% ZA 8
Aluminum 8.0-8.8
Copper 0.8-1.3
Magnesium 0.015-0.03
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