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

Tim Joseph

Tim Joseph

Sales Director Welding North America
bedra USA

Gini Xia

Gini Xia

Sales Director Assistant 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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