
WECOBA® Z
COPPER ALLOY
Many applications in electrical engineering, electronics and industrial manufacturing require materials that exceed the performance limits of pure copper – particularly where high mechanical strength and excellent electrical conductivity must be combined. Since pure copper provides only moderate strength, it is often unsuitable for components subjected to high mechanical or thermal loads. WECOBA® Z is an age-hardened, low-alloy copper material engineered specifically for applications with elevated mechanical and thermal stresses, while maintaining electrical conductivity levels close to pure copper.
RESISTANCE WELDING | ELECTRODES/HOLDERS | CONDUCTORS | COOLING PLATES | CASTING DIE
Key Features
Excellent electrical conductivity
Significantly higher strength and hardness compared to pure copper
Combines the advantages of CuCr and CuZr alloys in a single material
High thermal stability, even at elevated temperatures
Outstanding creep resistance
Chemical Composition nominal
Deviations may occur to achieve specific product characteristics.
Cr CHROMIUM | Zr ZIRCONIUM | OTHERS | Cu COPPER |
1.0 | 0.1 | max. 0.2 | balance |
EN | DIN | UNS | RWMA |
CW106C CuCr1Zr | 2.1293 | C18400 C18400 | Class 2 |
Typical Application
Resistance Welding (various tooling components), Spot welding, Seam welding, Butt welding, Cross-wire welding
Electrical components and current-carrying parts
Casting technology and metallurgical equipment
Typical Components
Electrodes, holders and inserts, Electrode caps
Crucibles, moulds and cooling plates for continuous casting (Aluminium and Steel)
Current-carrying springs and contacts
Physical and Mechanical Properties nominal
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| FORGED | EXTRUDED | ||
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| DIA 6-25mm | DIA 26-50mm | DIA 51-70mm |
Tensile strength Rm | (MPa) | 450 | 510 | 475 | 462 |
Yield strength RP0.2 | (MPa) | 350 | 472 | 412 | 408 |
Brinell hardness | (10/1000) | 142 | 158 | 149 | 132 |
Elongation A5 | (%) | 18 | 20 | 19 | 18 |
Elasticity modulus E | (GPa) | 120 | 120 | 120 | 120 |
Density ρ | (g/cm³) | 8.9 |
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Thermal conductivity λ- 20°C | (W/m.K) | 327 |
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Electrical conductivity- 20°C | (% I.A.C.S.) | 82 |
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Electrical conductivity | (m/W*mm2) | 51 |
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Coefficient of thermal expansion α | (10-6/K) | 17 |
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The values provided are based on experience gained from production facilities, material manufacturers and our own investigations. They may vary due to production- and batch-related influences and therefore do not constitute a guarantee or a warranted property. For the evaluation of specific applications, we are pleased to provide support upon request. Binding statements or commitments are issued exclusively in written form by our technical team. Rev. 02/2025
