Zinkberatung e. V. 1981 Grade G-ZnAl27Cu2 heat treated

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Description

The material ZnAl27Cu2, a fine zinc block metal alloy acc. to ASTM B 669, german marking ZA 27, is used with the transition coming from malleable cast iron or cast iron with nodular graphite, brass or bronze, where it depends on highest strength and strain. ZA 27 is the best alloy for operatings temperature to 120 °C. The alloy is pressure tight, even in thin cross sections. Where however highest pressure tight ones is necessary, the alloys ZnAl8 or ZnAl12 should be considered. The material is excellently machinable and on high polish sharpening and polishingable. The alloy is used mainly for sand and ingot casting, in addition, for pressure casting on cold chamber machines.

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

5 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

75 GPa

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Elongation A50

20.0 °C

8 - 11 %

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Hardness, Brinell

20.0 °C

90 - 100 [-]

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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

310 - 325 MPa

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Yield strength Rp0.2

20.0 °C

254 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

25 - 28 %

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Cadmium

3E-3 %

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Copper

2 - 2.5 %

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Iron

0.1 %

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Lead

4E-3 %

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Magnesium

0.01 - 0.02 %

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Tin

2E-3 %

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Zinc

69.37 %

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Technological properties

Property
Processing methods

sand casting