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Zamak

Zamak 5 / ZL0410 / ZnAl4Cu1

Zamak 5 has the same composition as zamak 3 with the addition of 1% copper in order to increase strength (by approximately 10%), hardness and corrosive resistance, but reduces ductility. It also has less dimensional accuracy Zamak 5 is more commonly used in Europe.

Zamak 5 is more readily plated, finished, and machined than Zamak 3
When a measure of tensile performance is needed, Zamak 5 castings are recommended.

Zamak 5 is used especially in the accessories and automobile industries with its high performance in coating, painting and chromating processes

• It has a higher copper content than Zamak 3, which results in higher strength
• It has less ductility (increased elongation) than Zamak 3
• Manufacturer must keep in mind that this reduction in ductility can affect formability during secondary operations such as bending, riveting, swaging, and crimping operations

Zamak 5 (EN1774 European Standard) Chemical Analysis

Analysis (EN1774) ( %) Zamak 5 / ZL0410 / ZnAl4Cu1
Al 3.8 – 4.2
Cu 0.7 – 1.1
Mg 0.035 – 0.06
Pb ≤0.003
Fe ≤0.02
Cd ≤0.003
Sn ≤0.001
Si ≤0.02
Ni ≤0.001

Zamak 5 General Mechanical Properties

Mechanical Properties Metric Value
Ultimate Tensile Strength 331 MPa (270 MPa aged)
Yield Strength 295 MPa
Impact Strength 52 J (56 J aged)
Elongation at Fmax 2%
Elongation at Fracture 3.6% (13% aged)
Shear Strength 262 MPa
Compressive Yield Strength 600 MPa
Fatigue Strength (reverse bending 5×108cycles) 57 MPa
Hardness 91 Brinell
Modulus of Elasticity 96 GPa

Zamak 5 General Physical Properties

Physical Properties Metric Value
Solidification Range (melting range) 380—386 °C
Density 6.7 kg/dm3
Coefficient of Thermal Expansion 27.4 μm/m-°C
Thermal Conductivity 109 W/mK
Electrical Resistivity 6.54 μΩ-cm at 20 °C
Latent Heat (heat of fusion) 110 J/g
Specific Heat Capacity 419 J/kg-°C
Coefficient of Friction 0.08
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