Copper Alloy 25 / CuBe2 – Properties, Applications and Technical Data
Alloy 25, also known as CuBe2, is a copper-beryllium alloy that combines very high strength with good electrical and thermal conductivity. The material is used in technically demanding applications where high strength, good wear resistance and stable performance are crucial.
The alloy is particularly known for its ability to achieve very high strength through age hardening, while maintaining the good conductivity of copper.
Alloy 25 is often used in electronics, energy, aerospace and precision mechanics where components are exposed to high loads and repetitive movements.
Properties of Alloy 25 / CuBe2
CuBe2 is a precipitation-hardenable copper alloy where small amounts of beryllium provide very high mechanical strength after heat treatment.
The material offers a unique combination of spring properties, wear resistance and electrical conductivity.
- Type: Copper-beryllium alloy
- Alloy: Cu-Be
- Structure: Precipitation hardened copper alloy
- Designations: Alloy 25, CuBe2, UNS C17200, EN CW101C, CW101C, W.Nr. 2.1247
- Typical composition: Be ~1.8–2.0%, the rest Cu
Advantages
- Very high strength after age hardening
- Good electrical and thermal conductivity
- Excellent spring properties
- Very good fatigue strength
- Good wear resistance
Limitations
- Higher material cost than standard copper alloys
- Machining often requires special tools
- Handling requires safety procedures when machining beryllium-containing material
Alloy 25 / CuBe2 for electronics, springs and precision components
Alloy 25 is one of the strongest copper alloys and is often used in components that require both high mechanical strength and good electrical conductivity.
The material often appears in technical specifications under designations such as CuBe2, Alloy 25, UNS C17200 or EN CW101C.
Common product forms for Alloy 25 / CuBe2
- Round bar
- Sheet and strip
- Wire
- Precision manufactured components
- Special dimensions according to drawing
Typical components manufactured in CuBe2
- Electrical contacts
- Springs
- Precision components
- Connectors and contacts
- Tools and wear components
Corrosion and wear resistance
Alloy 25 offers good corrosion resistance in many industrial environments as well as very good wear resistance.
The combination of strength and conductivity makes the material particularly useful in electrical and mechanical systems where long service life is important.
Environments where Alloy 25 performs well
- Electrical systems
- Precision mechanical applications
- Applications with repetitive motions
- Environments with high mechanical loads
Environments to avoid
- Applications where simpler copper alloys are sufficient
- Environments where maximum electrical conductivity is required without strength requirements
Technical data (age-hardened condition)
| Yield strength (0.2%) |
~1000–1200 MPa |
| Tensile strength |
~1200–1400 MPa |
| Elongation |
~5–10 % |
| Density |
~8.25 g/cm³ |
| Modulus of elasticity |
~131 GPa |
| Electrical conductivity |
~20–25 % IACS |
| Thermal conductivity |
~105 W/m·K |
With a global network of suppliers, we can offer Alloy 25 / CuBe2 in technical dimensions for demanding applications.
Contact us for technical advice or quotation.
Supplier of Alloy 25 / CuBe2 with certified quality
HARALD PIHL is one of Europe's largest suppliers of special alloys, including copper alloys such as Alloy 25 / CuBe2.
With over 100 years of experience in the metal industry, we deliver materials with full traceability and certification according to EN 10204 3.1 / 3.2 as well as relevant ASTM and ISO standards.
Cutting, testing and quality assurance are carried out in-house to ensure the right tolerances and fast global delivery for technically demanding projects.
- Europe's largest stock of nickel and titanium alloys
- Special alloys from stock
- ASTM / ISO standards
- Top quality for technical applications
- Fast global delivery
- Full material certification (EN 10204 3.1 / 3.2)
- Over 100 years in the metal industry
- Nickel and titanium experts
