Nihonweld N-NiMo-3 description: N-NiMo-3 is a nickel-molybdenum flux-coated electrode designed specifically for welding Hastelloy W to itself or to a variety of other alloys used in high temperature service applications. NIHONWELD N-NiMo-3 is excellent for joining dissimilar combinations of cobalt, nickel and iron-base alloys.