bercoweld® B12

The high-alloy CuSn alloy bercoweld®  B12 is suitable for all welding processes. The weld metal achieves high hardness corresponding to a cast bronze, so it’s used for particularly wear-resistant coatings as well as for join welding and repairs on bronzes. Very suitable for oven soldering.

Standardization and composition

ISO 24373 CuSn12P Cu5410
Cu balance
Sn 12.00 - 13.00
P 0.15 - 0.25
Others max. 0.5

Physical properties

Density (kg/dm³) 8.6
Melting range (°C) 825 - 990
Thermal conductivity (W / m x K) 40 - 50
Coefficient of linear mean expansion (10-6/K) 18.5
Electric conductivity (m / Ω x mm²) 3 - 5
Resistivity (Ω x mm² /m) 0.20 - 0.333

Mechanical properties of the weld joint (standard data)

Heat treatment non treated
Tensile strength (MPa) 320
Elongation (%) 5
Brinell hardness (HB 2.5/62.5) 120
Notched bar impact test (Av (J)) 8

Delivery options

Make-up Weight/Length
Drum / bedrabox 175 - 200 kg
SD300 / BS300 / K300 12 - 15 kg
H500 / H560 / H760 150 - 250 kg
Coils 25 - 100 kg
Rods 250 - 3000 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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