Zamak 5

Zamak 5 (ASTM AC41A) or Zinc Alloy 5, is the most widely used zinc alloy in Europe. 

  • It has a higher copper content than Zamak 3, which results in higher strength
  • It has less ductility (increased elongation) than Zamak 3
  • Designers must keep in mind that this reduction in ductility can affect formability during secondary operations such as bending, riveting, swaging, or crimping operations
  • Because of the wide availability of Zamak 3, component engineers often strengthen components by design modifications instead of using Zamak 5
  • When a measure of tensile performance is needed, Zamak 5 castings are recommended.
  • Zamak 5 is more readily plated, finished, and machined than Alloy 3

Mechanical Properties

Material Alloy Tensile Strength   Yield Strength   Impact Strength   Shear Strength   Hardness   Elongation   Process
MPa
MPa
J
MPa
Brinell (HB)
% in 50mm
Zinc
328
228
65
262
91
7

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
383
109
27.4
26.0

Composition

Zinc
% Zamak 5
Aluminum 3.5-4.3
Copper 0.75-1.25
Magnesium 0.03-0.08
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