Zamak 2

Zinc Alloy 2, also known as Kirksite or Zamak 2 (ASTM AC43A), is the highest strength and hardness of the Zamak family. This alloy has excellent casting characteristics including: 

  • A higher creep performance than other Zamak alloys
  • Excellent damping capacity and vibration attenuation in comparison to aluminum die cast alloys
  • High strength and hardness levels after long-term aging

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
7
52
41
35
46
100

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
0.240
725
60.5
15.4
25.0

Composition

Zinc Casting Metals
% Zamak 2
Aluminum 3.5-4.3
Copper 2.5-3.0
Magnesium 0.02-0.05
Iron (max) 0.1
Lead (max) 0.005
Cadmium (max) 0.004
Tin (max) 0.003
Nickel (max)
Zinc Bal.
Manganese
Silicon
Other-Metallic
RoHS Compliant

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Last updated 12.23.2019