NICKEL BASE BRAZING ALLOY

A nickel base, relatively low temperature brazing alloy, particularly suitable for brazing, carbon and low alloy steels, nickel base alloys, copper alloys and stainless steels, (including thin sections, eg. honeycomb) in dryhydrogen or inert atmospheres at partial-pressure or high vacuums. The brazing alloy is also suitable for brazing in "wet" endothermic and dissociated ammonia atmospheres. The brazing alloy consists essentially of, by weight, about 19 to 23 per cent manganese, 5 to 8 per cent silicon, 4 to 6 per cent copper, 0.6 to 1.8 per cent boron, 0.01 to 0.2 per cent rare earth, preferably mischmetal, additions of up to 3 per cent tantalum, molybdenum, columbium, tungsten, and aluminum, under 0.3 per cent carbon and the balance nickel. The brazing alloys of this Invention will braze below 1850.degree.F, permit multiple braze cycles without remelting and provide joint service temperature to 1700.degree.F.