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Technical

technical

technical

datasheet

datasheet

WECOBA® Z

WECOBA Letter Grade Chart
WECOBA Letter Grade Chart
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

Standards

Standards

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

 

 

FORGED

EXTRUDED

 

 

 

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

 

 

 

Thermal conductivity λ- 20°C

(W/m.K)

327

 

 

 

Electrical conductivity- 20°C

(% I.A.C.S.)

82

 

 

 

Electrical conductivity

(m/W*mm2)

51

 

 

 

Coefficient of thermal expansion α

(10-6/K)

17

 

 

 

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