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EN 12166 Grade CuCo2Be R680 – Premium Copper‑Cobalt‑Beryllium Alloy for Wire, Springs & Fasteners

Application: general purpose wire, springs, fasteners

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.8 - 8.9 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

138 GPa

Elongation

20.0 °C

10 %

Elongation A100

20.0 °C

3 - 6 %

Elongation A11.3

20.0 °C

6 - 8 %

Tensile strength

20.0 °C

680 MPa

Yield strength Rp0.2

20.0 °C

550 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

1.8E-5 1/K

Max service temperature, long

0 - 350 °C

Melting point

855 - 1090 °C

Typical for Wrought Copper High Copper Alloy

Specific heat capacity

23.0 °C

360 - 420 J/(kg·K)

Typical for Wrought Copper High Copper Alloy

Thermal conductivity

20.0 °C

192 - 239 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

2.50E+7 - 3.20E+7 S/m

Specific Electrical conductivity

43 % IACS

Chemical properties

PropertyValue

Beryllium

0.4 - 0.7 %

Cobalt

2 - 2.8 %

Iron

0.2 %

Nickel

0.3 %


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