Nihonweld N-NiMo-7 description: N-NiMo-7 is a nickel-molybdenum flux-coated electrode developed specifically for welding similar base metals such as Hastelloy B-2 to itself or to steel and nickel alloys. Common base metals that can also be welded would include ASTM B333, B335, B619, B622 AND B626 all of which have UNS number N10665. NIHONWELD N-NiMo-7 has a controlled low level or carbon, iron and cobalt which together with nickel and molybdenum gives this electrode excellent resistance to pitting and stress corrosion cracking commonly caused by acids.