KCu-70

For butt or over-lap welding in Cu-Ni alloy (70%Cu-30%Ni, 80%Cu-20%Ni)

▎Classification

AWS A5.6/A5.6MECuNi
JIS Z3224DCuNi-3
EN –
GB T3670ECuNi-B

▎Applications and Features

  • For direct current welding electrodes, featuring excellent weldability and workability.
  • Exhibits good resistance to seawater corrosion.
  • Suitable for welding copper-nickel alloys, such as 70%Cu–30%Ni, 80%Cu–20%Ni, as well as for cladding and joining copper-nickel alloys.
  • Applicable to the welding of seawater desalination equipment, seawater treatment systems, evaporators, and condensers.

▎Welding Instruction

  • For drying conditions, please refer to the re-drying instructions for welding electrodes and submerged arc welding flux.
  • For other information, please refer to the welding precautions for copper and copper-base alloys.

▎Application

Applicable to the welding of seawater desalination equipment, seawater treatment systems, evaporators, and condensers.

▎Typical Chemical Composition of Weld Metal (wt%)

CSiMnPSNiTiPbFeCu
0.030.050.860.0030.00131.330.410.010.6764.71

▎Typical Mechanical Properties of Weld Metal

Tensile Strength
N/mm²
Yield Strength
N/mm²
Elongation
%
Charpy V-Notch
Charpy V-Notch
J
38626830

▎Size and Suggested Operating Range (AC or DC±)

Diameter (mm) 2.63.24.04.8
F/H-fillet
Current(A)
60-8670-11595-145140-180
V-up/OH
Current(A)
55-8565-11085-135

▎Certification