Brazing is defined as which of the following?

• A. A welding process using filler metal above welding temperature
• B. Joining of two metals at an intermediate temperature above 800F using non-ferrous material
• C. A process that fuses metals with a torch
• D. A mechanical fastening method

Answer: (B)

Brazing joins two metal pieces by filling the joint with a non-ferrous filler metal that melts at a middle-ground temperature—above 800°F—so it flows into the gap by capillary action without melting the base metals themselves. This is the defining feature: the filler metal bonds the pieces while the original metals stay solid. The emphasis on a higher-temperature filler that is non-ferrous distinguishes brazing from soldering (lower temperatures) and from welding (where the base metals are melted and fused together). It’s also not a mechanical fastener, which is about physical joining without a filler metal.