Brazing Q&A

Q: We braze various stainless steel assemblies using BNi series filler metals that conform to AWS 5.8, Specification for Filler Metals for Brazing and Braze Welding. The most common is BNi-1a on 321 stainless. We have several furnaces, and the brazing is performed in vacuum. Our brazing cycle includes holding the temperature at about 50°F below the solidus of the filler metal to let the furnace load come to equilibrium, followed by a ramp up to 2100°F (1148°C). We hold at this brazing temper..