bercoweld® K9

bercoweld® K9 is made of copper silver material. Especially suitable for buildup and join welding on copper; preheat to about 450° C for large workpieces.

Standardization and composition

ISO 24373 CuAg1 Cu1897
Cu balance
Ag 0.80 - 1.00
P 0.01 - 0.05
Mn 0.04 - 0.10
Others max. 0.2

Physical properties

Density (kg/dm³) 8.9
Melting range (°C) 1070 - 1080
Thermal conductivity (W / m x K) 220 - 315
Coefficient of linear mean expansion (10-6/K) 17.7
Electric conductivity (m / Ω x mm²) 44 - 46
Resistivity (Ω x mm² /m) 0.0217 - 0.0227

Mechanical properties of the weld joint (standard data)

Heat treatment non treated
Tensile strength (MPa) 200
Elongation (%) 30
Brinell hardness (HB 2.5/62.5) 60
Notched bar impact test (Av (J)) 75

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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