W-340 (CW106C)

Copper Chromium Zirconium (CuCrZr).

W-340 is a copper alloy with high strength values along with high thermal and electric conductivity. This alloy also have good resistance against softening at high temperatures. A common area of use is for example welding electrodes.

Areas of use
Welding electrodes, casting moulds for steel and aluminium casting, electrical components and connectors, turbine components in contact with high temperatures etc.








Chemical composition (nom. values)
– Cu Rest.
– Cr 0.5-1.2%
– Zr 0.03-0.3%

Max impurities
– Other. 0.2 % max.

Physical properties
Mean linear coefficient of thermal expansion (10-6/K): 17
Thermal conductivity (W/mK): 330
Electrical conductivity (m/W ohm mm²): 44-49
Elastisity modulus E (kN/mm²): 138
Density (g/cm3): 8.9

Mechanical properties
Yield strength (Rp N/mm²): 400 N/mm²
Tensile strength (Rm N/mm²): >1140 N/mm²
Elongation in % A5: 2.5-5.0%
Hardness/Brinell: 340-380 HB
Hardness/Rockwell: 72-80 HRB

Additional information