OK Tigrod 19.49 GTAW ERCuNi Description Bare Cu-Ni rods for welding similar alloys, such as 90Cu10Ni, 80Cu20Ni and 70Cu30Ni alloys. The addition of nickel strengthens the weld metal and improves corrosion resistance, particularly to salt water. The alloy is used for the overlay welding of steels and is widely used for welding Cu- Ni components for desalination plants. Welding current DC(-) Classifications SFA/AWS A5.7 ERCuNi EN 14640 S Cu 7158 (CuNi30) Wire composition C Si Mn Fe Cu <0.05 <0.1 0.8 0.6 bal. Typical mech. properties all weld metal Yield stress, MPa 180 Tensile strength, MPa 350 Elongation, % 40 Charpy V Test temps, °C Impact values, J +20 90
