Copper beryllium

About the material

Copper-beryllium alloys combine high mechanical strength with good electrical conductivity – a combination unique among copper alloys. They are ideal for applications in electrical engineering, connection technology and watchmaking where elastic properties, heat resistance and conductivity are required at the same time.

Benefits of copper beryllium at a glance

• Highest strength of all copper alloys
• Very good electrical conductivity (up to 50% IACS)
• Excellent relaxation and fatigue strength
• Ideal for miniature contacts, springs, connectors, sensors

CuBe2 / Alloy 25 (C17200 / CW101C)

Contains approx. 2% beryllium and, after hardening offers the highest strength of all copper alloys. At the same time, electrical conductivity remains significantly higher than that of bronze. Ideal for applications with high requirements in terms of fatigue strength, relaxation behaviour and formability.

Alloy 190 (C17200 / CW101C, factory hardened)

Factory hardened version of alloy 25. No heat treatment required at the customer’s premises – this prevents distortion of finished parts. Good bending properties, depending on the temper selected.

M25 (C17300/CW102C)

A leaded version of CuBe2 – developed for machining. Excellent for worked precision parts, with good swarf control, tool service life and spot annealing properties. Can be galvanically coated.

CuCoBe / Alloy 174 (C17410)

Copper alloy with low beryllium and cobalt content. Delivered in a hardened state – saves process costs by eliminating the need for heat treatment. It offers up to 50% IACS conductivity at 750N/mm² tensile strength – ideal for applications with a high performance/cost ratio.