Nickel base brazing alloy

Details Nickel base brazing alloy Nickel base brazing alloy

1976-04-30

1978-02-21

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22C 1903

Patent

active

040750094

ABSTRACT:
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 dry-hydrogen or inert atmospheres and in 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 percent manganese, 5 to 8 percent silicon, 4 to 6 percent copper, 0.6 to 1.8 percent boron, 0.01 to 0.2 percent rare earth, preferably mischmetal, additions of up to 3 percent tantalum, molybdenum, columbium, tungsten, and aluminum, under 0.03 percent 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.

REFERENCES:
patent: 2856281 (1958-10-01), Cremer et al.

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