Zamak 3

Zamak 3 (ASTM AG40A), or Zinc Alloy 3, is the most widely used zinc alloy in North America and is usually the first choice when considering zinc for die casting for a number of reasons.

  • Excellent balance of desirable physical and mechanical properties
  • Superb castability and long-term dimensional stability
  • Excellent finishing characteristics for plating, painting, and chromate treatments
  • Excellent damping capacity and vibration attenuation in comparison to aluminum die cast alloys

When it comes to die casting, Zamak 3 is the standard by which other zinc alloys are rated.

Mechanical Properties

Material Alloy Tensile Strength   Yield Strength   Impact Strength   Shear Strength   Hardness   Elongation   Process
MPa
MPa
J
MPa
Brinell (HB)
% in 50mm
Zinc
283
221
58
214
82
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
6.60
384
113
27.4
27.0

Composition

Zinc
% Zamak 3
Aluminum 3.5-4.3
Copper 0.25
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 11.18.2019