Arcos 1N12 description: Arcos 1N12, a high nickel electrode, is used for welding nickel-chromium-molybdenum alloys to themselves and to steel. It is also suitable for welding 5% and 9% nickel steels for low temperature service to themselves as well as to low alloys or stainless steel. Arcos 1N12 has moderate strength, good fabricability and exceptional corrosion resistance from cryogenic to elevated (up to 1,800˚F). This electrode resists corrosive attack and is virtually immune to chloride-ion stress-corrosion cracking.