EN 12844 Grade GD-ZnAl4 cast condition

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Description

The material GD-ZnAl4, material NR. 2.4140, characteristic Z 400, one uses for diecastings. If there are high requirements to the accuracy to size of the products produced by diecasting, this alloy should be preferred. The material is substantially more ductile than the other high quality casting alloys. These characteristics however bought by somewhat worse physical properties and a somewhat smaller corrosion resistance in relation to intergranular corrosion in the comparison to Z 410. The casting temperature is about 425 °C (max. 450 °C) amounted to, the form temperature (pressure pouring) is on approximately 180 to max. to adjust 250 °C.

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

6.6 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

130 GPa

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Elongation

20.0 °C

3 - 6 %

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Hardness, Brinell

20.0 °C

70 - 90 [-]

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Poisson's ratio

23.0 °C

0.3 [-]

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Typical for Zinc Aluminium

Tensile strength

20.0 °C

250 - 300 MPa

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Yield strength Rp0.2

20.0 °C

200 - 230 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

2.2E-5 - 2.8E-5 1/K

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Typical for Zinc Aluminium

Melting point

375 - 485 °C

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Typical for Zinc Aluminium

Specific heat capacity

20.0 °C

427 J/(kg·K)

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Thermal conductivity

20.0 °C

92 - 100 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

1.50E+7 - 1.60E+7 S/m

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Chemical properties

PropertyValue

Aluminium

3.5 - 4.3 %

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Copper

0.1 %

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Iron

0.05 %

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Magnesium

0.02 - 0.06 %

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Nickel

0.02 %

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Tin

2E-3 %

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Zinc

95.4 %

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Technological properties

Property
Processing methods

pressure die casting, separately cast test sample