bercoweld® K5

bercoweld®  K5 is suitable for highly-stressed welded joints on oxygen-free copper and Cu materials. Very good processability and pore-free weld seams. When TIG welding large workpieces, preheating to 300° C is recommended.

Standardization and composition

ISO 24373 CuSn1 Cu1898
Cu balance
Sn 0.75 - 0.90
Mn 0.15 - 0.30
P 0.005 - 0.020
Si 0.15 - 0.25
others max. 0.5

Physical properties

Density (kg/dm³) 8.9
Melting range (°C) 1020 - 1050
Thermal conductivity (W / m x K) 120 - 145
Coefficient of linear mean expansion (10-6/K) 18.1
Electric conductivity (m / Ω x mm²) 15 - 20
Resistivity (Ω x mm² /m) 0.05 - 0.0667

Mechanical properties of the weld joint, standard data

Heat treatment non treated
Tensile strength (MPa) 220
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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