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Beryllium-Copper

Copper-beryllium alloys offer a combination of mechanical and electrical properties which is unique for copper alloys. The mechanical strength achieved after heat treatment ranks highest among all copper alloy materials and is combined with an electrical conductivity which outperforms that of bronzes.

In order to best meet the different needs of the electrical engineering, connector and watch industries, a full range of copper-beryllium alloys is rolled.

High strength
Beryllium copper can attain a high tensile strength, to a maximum of 1480 MPa and therefore can endure very high bending stresses as a spring material.

High electrical conductivity
The electrical conductivity of Beryllium copper is 20% to 50% lACS, depending on chemical composition and heat treatment applied, Beryllium copper is the best material for high current density springs because of the low heat generation resulting from this high electrical conductivity.

High fatigue strength
Beryllium copper is known to have high fatigue strength because it shows an excellent resistance to fatigue under reverse bending and it continues to have a long life and high reliability.

High elasticity
Beryllium copper has an extremely high tensile strength to Young's modulus ratio. This contributes to the fabrication of a compact spring with good response to the load applied.

Elevated temperature properties
Beryllium copper is a precipitation hardening alloy with excellent properties at elevated temperatures and can be used in a wide range of temperatures

Good formability
Beryllium copper can be formed into complicated shapes in a solution annealed state. High spring properties such as the highest mechanical properties, good electrical conductivity and heat resistance will be obtained by proper heat treatment after forming.

Corrosion resistance
Beryllium copper has good corrosion resistance nearly equal to nickel silver and is not susceptible to hydrogen embrittlement