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 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
10
41
32
43
31
82

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
723
65.3
15.2
27.0

Composition

Zinc Casting Metals
% 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 12.23.2019