EN 12166 Grade CuNi18Zn20 H145

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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.

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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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20.0 °C

8.7 - 8.73 g/cm³

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Elastic modulus

20.0 °C

135 GPa

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Hardness, Brinell

20.0 °C

140 [-]

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Hardness, Vickers

20.0 °C

145 - 185 [-]

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Poisson's ratio

20.0 °C

0.34 [-]

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Coefficient of thermal expansion

300.0 °C

1.7E-5 1/K

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Melting point

875 - 1135 °C

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Typical for Wrought Copper Nickel Silver Grade

Specific heat capacity

20.0 °C

383 J/(kg·K)

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Thermal conductivity

20.0 °C

33 W/(m·K)

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Electrical conductivity

20.0 °C

3.30E+6 S/m

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Specific Electrical conductivity

6 % IACS

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Chemical properties



60 - 63 %

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0.3 %

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0.03 %

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0.5 %

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17 - 19 %

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0.03 %

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