bercoweld® K3

bercoweld®  K3 is a special copper wire for coated electrodes. Suitable for arc welding of copper as well as joining copper with steel, gray cast iron and Ni alloys from 3mm wall thickness. Especially suitable for large workpieces.

Pulsed power welding is recommended.

As a rule, preheating of the base material is not necessary.

Standardization and composition

ISO 24373 CuZ (CuP)
Cu balance
P 0,05 - 0,07

Physical properties

Density (kg/dm³) 8,9
Melting range (°C) ca. 1080
Thermal conductivity (W / m x K) 293 - 364
Coefficient of linear mean expansion (10-6/K) 17
Electric conductivity (m / Ω x mm²) 41 - 52
Resistivity (Ω x mm²) /m 0,0192 - 0,0244

Mechanical properties of the weld joint (standard data)

Heat treatment non treated
Tensile strength (MPa) 220
Elongation (%) 40
Brinell hardness (HB 2,5/62,5) 50
Notched bar impact test (Av (J)) 65

Delivery options

Make-up Weight/Length Dimension
Drum / bedrabox 175 - 200 kg 0,80 - 1,60 mm
SD300 / BS300 / K300 12 - 15 kg 0,80 - 2,40 mm
H500 / H560 / H760 150 - 250 kg 0,80 - 2,40 mm
Coils 25 - 100 kg 1,60 - 6,00 mm
Rods 250 - 3000 mm 1,60 - 6,00 mm

Further product information

Please contact me and my team

Ulrike Ogorzelski

Ulrike Ogorzelski

Sales Director Welding Europe
bedra Germany

George Kelley

George Kelley

Sales Manager Welding & ELAS North America
bedra USA

Crystal Wen

Crystal Wen

Sales Manager Welding Asia
bedra China

Berkenhoff GmbH (headquarters)

  • Kinzenbach plant
  • Berkenhoffstrasse 14
  • 35452 Heuchelheim
  • Germany

Berkenhoff GmbH

  • Merkenbach plant
  • Rehmühle 1
  • 35745 Herborn
  • Germany

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