CuCo2Be / CW104C

CuCo2Be – Properties, Applications and Technical Data

CuCo2Be is a precipitation-hardenable copper-cobalt-beryllium alloy developed for applications where high mechanical strength must be combined with good electrical and thermal conductivity. The material is often used in electrical contacts, resistance welding, forming tools and highly stressed industrial components.

The alloy is known under the designation CW104C and Werkstoffnummer 2.1285 and offers an optimal balance between strength, wear resistance and conductivity compared to pure copper and traditional copper alloys.

Properties of CuCo2Be

CuCo2Be achieves its high mechanical properties through age hardening. The combination of cobalt and beryllium provides increased strength and improved fatigue resistance while maintaining a significant part of the copper's conductivity.

The material is particularly well suited for components that are exposed to both electrical load and mechanical stress.

- Type: Precipitation-hardenable copper alloy
- Alloy: Cu-Co-Be
- EN designation: CuCo2Be
- Trade name: CW104C
- Material number: 2.1285

Advantages

High strength in aged condition
Good electrical conductivity (approx. 45–60% IACS)
Very good thermal conductivity
High wear resistance and fatigue strength
Suitable for electrical and thermally loaded applications

Limitations

Lower conductivity than pure copper
Requires controlled heat treatment for optimal performance
Not intended for highly corrosive or marine environments

Typical applications for CuCo2Be

Resistance welding

Welding and electrode carriers where the combination of strength and conductivity is crucial.

Electrical contacts

Current-carrying components with requirements for mechanical stability.

Form and tool inserts

Applications where effective heat dissipation and wear resistance are required.

Industrial machine components

Parts exposed to both cyclic loading and electrical impact.

Corrosion and oxidation resistance

CuCo2Be has good resistance in normal industrial environments but is primarily optimized for mechanical and electrical performance rather than aggressive chemical environments. For marine or highly corrosive applications, alternative alloys should be considered.

Environments where CuCo2Be performs well

Electrically loaded components
High thermal cycling
Fatigue loaded parts
Tooling and welding applications

Environments to avoid

Strongly acidic environments
Highly aggressive chloride environments
Applications where maximum electrical conductivity is required

Technical data (aged condition)

Yield strength 0.2%	~600–750 MPa
Tensile strength	~700–850 MPa
Elongation at break	~5–15%
Density	~8.8 g/cm³
Electrical conductivity	~45–60 % IACS
Hardness	~190–250 HB
Weldability	Limited – special procedures recommended

We offer CuCo2Be in various shapes and dimensions with full traceability and material certificates according to EN 10204 3.1.

Buy CuCo2Be from HARALD PIHL – your specialist in high-performance copper alloys with global delivery.

Our strengths

Large stock of copper and special alloys
Fast global delivery from Europe
Full traceability and certification according to EN 10204 3.1
Material according to EN / ASTM / customer specification
Cutting and processing according to drawing

Document:

Hovadur CCNB CuCo2Be

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