Zinkberatung e. V. 1981 Grade G-ZnAl8Cu1 cast condition

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Description

The material ZnAl8Cu1, a fine zinc block metal alloy acc. to ASTMB 669, german marking ZA 8, is the best alloy for casting with continuous form. It has the smallest strength, but best surface treatment characteristics opposite the marks ZnAl12Cu1 and ZnAl27Cu2. The alloy is outstanding pressure-tight, even in thin cross sections, excellently machinably and on high polish sharpening and polishingable. The alloy is used mainly for sand and ingot casting, in addition, for die casting on cold chamber machines. The alloy ZA 8 exhibits a clearly improved creep rupture behaviour in relation to the alloy Z 430 (G-ZnAl4Cu3).

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

6.3 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

85 GPa

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Elongation A50

20.0 °C

1 - 2 %

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Hardness, Brinell

20.0 °C

85 - 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

220 - 275 MPa

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Yield strength Rp0.2

20.0 °C

190 - 200 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

23.0 °C

393 - 525 J/(kg·K)

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Typical for Zinc Aluminium

Thermal conductivity

23.0 °C

105 - 125 W/(m·K)

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Typical for Zinc Aluminium

Chemical properties

PropertyValue

Aluminium

8 - 8.8 %

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Cadmium

3E-3 %

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Copper

0.8 - 1.3 %

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Iron

0.1 %

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Lead

4E-3 %

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Magnesium

0.02 - 0.03 %

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Tin

2E-3 %

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Zinc

89.76 %

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Technological properties

Property
Processing methods

permanent mould casting