ZA 8

ZA-8, or zinc Aluminium alloy, contains significantly more Aluminium than the Zamak group of alloys. ZA-8 contains approximately 8.4% Aluminium 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 Mould 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   Elongation   Hardness   Impact Strength   Young's Modulus   Yield Strength (0.2%)   Fatigue Strength   Creep Limit   Process
MPa
% in 50mm
Brinell (HB)
J
Gpa
MPa
Mpa
Mpa
Zinc
374
10
103
42
-
290
-
-

Physical Properties

Material Alloy Density   Melting Point (Average +/- 50)   Coefficient of Thermal Expansion   Thermal Conductivity   Electrical Conductivity   Process
g/cm3
°C
µm/m°K
W / m K
% IACS
Zinc
6.30
390
23.3
115
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
Titanium -
Chromium -
RoHS Compliant

 

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Last updated 03.22.2021