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Zamak 3 / ZL0400 / ZnAl4

Zamak 3 is the de facto standard for the zamak series of zinc alloys; all other zinc alloys are compared to this. It has excellent castability and long term dimensional stability.

Zamak 3 also offers excellent finishing characteristics for plating, painting and chromate treatments. It is the “standard” by which other zinc alloys are rated in terms of die casting

Excellent balance of desirable physical and mechanical properties

Zamak 3 has the base composition for the zamak alloys (96% zinc, 4% aluminium)

• 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

Zamak 3 (EN1774 European Standard) Chemical Analysis

Analysis (EN1774) ( %) Zamak 3 / ZL0400 / ZnAl4
Al 3.8 – 4.2
Cu 0.03
Mg 0.035 – 0.06
Pb ≤0.003
Fe ≤0.02
Cd ≤0.003
Sn ≤0.001
Si ≤0.02
Ni ≤0.001

Zamak 3 General Mechanical Properties

Mechanical Properties Metric Value
Ultimate Tensile Strength 268 MPa
Yield Strength 208 MPa
Impact Strength 46 J (56 J aged)
Elongation at Fmax 3%
Elongation at Fracture 6,3% (16% aged)
Shear Strength 214 MPa
Compressive Yield Strength 414 MPa
Fatigue Strength (reverse bending 5×108cycles) 48 MPa
Hardness 97 Brinell
Modulus of Elasticity 96 GPa

Zamak 3 General Physical Properties

Physical Properties Metric Value
Solidification Range (melting range) 381—387 °C
Density 6.7 kg/dm3
Coefficient of Thermal Expansion 27.4 μm/m-°C
Thermal Conductivity 113 W/mK
Electrical Resistivity 6.37 μΩ-cm at 20 °C
Latent Heat (heat of fusion) 110 J/g
Specific Heat Capacity 419 J/kg-°C
Coefficient of Friction 0.07
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