Nihonweld N-NiCu-7 description: N-NiCu-7 flux-coated electrodes are designed for shielded metal arc welding of nickel-copper Monel 400 and 404 to themselves and to steel. This electrode is perfect for joining many nickel-copper alloys to copper, copper-nickel, carbon steel and low alloy steel. NIHONWELD N-NiCu-7 is also used for overlaying on steel and for welding the clad side of joints in steel clad with a nickel-copper alloy.