60 is primarily designed for MIG, TIG and submerged arc welding of nickel-copper (Monel®) alloys 400 and 404 to themselves or to each other. Washington Alloy 60 is also used for dissimilar applications such as joining nickel-copper (Monel®) alloys to nickel base alloy 200 and for joining nickel-copper (Monel®) alloys 400 and 404 or nickel base alloy