Method of brazing

Claim 1

IN THE METHOD FOR JOINING BY BRAZING METAL ARTICLES COMPRISED PREDOMINANTLY OF METAL FROM THE IRON GROUP WHEREIN SAID METAL ARTICLES ARE PLACED IN CLOSE CONTACT WITH THE BRAZING MATERIAL AT THE CONTACTING POINTS AND THE RESULTING ASSEMBLY IS THEN HEATED TO THE BRAZING TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES USING AS THE BRAZING MATERIAL A MATERIAL CONSISTING ESSENTIALLY OF UP TO 25% OF A FLUX, WITH THE BALANCE A REDUCIBLE OXYGENCONTAINING PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS OXIDES, PHOSPHORUS ACIDS, AMMONIUM PHOSPHATES AND PHOSPHITES, ALKALI METAL PHOSPHATES AND PHOSPHITES HAVING AN ATOMIC RATIO OF ALKALI METAL TO PHOSPHORUS NOT GREATER THAN ABOUT 2:1 AND ALKALINE EARTH METAL PHOSPHATES AND PHOSPHITES HAVING AN ATOMIC RATIO OF ALKALINE EARTH METAL TO PHOSPHORUS NOT GREATER THAN ABOUT 1:1 AND CONDUCTING THE BRAZING OPERATION IN A REDUCING ATMOSPHERE SELECTED FROM THE GROUP CONSISTING OF DRY HYDROGEN AND DISSOCIATED AMMONIA AT A TEMPERATURE OF ABOUT 1600*F. TO ABOUT 2100*F.