EN 12166 Grade CuNi18Zn20 H04

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Description

Material CuNi18Zn20, mat. No. CW409J is an alloy of high strength and hardness. To the comparabel mark CuNi18Zn20, mat. No. 2.0740, acc. to DIN 17663 : 1983-12 applies: Strength is further increasable due to the high strain hardening capability. The material does not embrittle at low temperatures. Low electrical and thermal conductivity. The alloy is non-magnetic, corrosion resistance is better than for pure copper. Processing properties: warm forming: moderately cold forming: very good machinability: moderately hard and soft soldering: very good TIG-welding: very good burnishing: very good Application: In electrical engineering and electronics for springs, contacts, membranes as well as in precision engineering and in equipment manufacturing. In food industry, for musical instruments, glasses frames, safety keys as well as in construction trade for paneling, show-cases and stairrails.

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

PropertyTemperatureValueComment

Density

23.0 °C

8.4 - 8.9 g/cm³

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Typical for Wrought Copper Nickel Silver Grade

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

120 - 140 GPa

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Typical for Wrought Copper Nickel Silver Grade

Hardness, Vickers

20.0 °C

200 - 235 [-]

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Poisson's ratio

23.0 °C

0.32 [-]

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Typical for Wrought Copper Nickel Silver Grade

Tensile strength

20.0 °C

660 - 880 MPa

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Yield strength Rp0.2

20.0 °C

640 - 730 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1.6E-5 - 1.9E-5 1/K

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Typical for Wrought Copper Nickel Silver Grade

Melting point

875 - 1135 °C

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Typical for Wrought Copper Nickel Silver Grade

Specific heat capacity

23.0 °C

377 J/(kg·K)

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Typical for Wrought Copper Nickel Silver Grade

Thermal conductivity

23.0 °C

21 - 116 W/(m·K)

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Typical for Wrought Copper Nickel Silver Grade

Chemical properties

PropertyValue

Copper

60 - 63 %

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Iron

0.3 %

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Lead

0.03 %

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Manganese

0.5 %

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Nickel

17 - 19 %

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Tin

0.03 %

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