What temperature separates brazing from soldering?

What temperature separates brazing from soldering?

• A. 840 degrees F
• B. 450 degrees F
• C. 1200 degrees F
• D. 1000 degrees F

Answer: (A)

The key idea is the boundary between soldering and brazing is defined by the temperature at which the filler metal melts. Soldering uses filler metals that melt at relatively low temperatures, while brazing requires higher heat so the filler metal melts and flows into the joint. That dividing temperature is about 450°C, which is roughly 842°F. Since 840°F is a close approximation, it serves as the practical cutoff between soldering and brazing. The other temperatures are either well below or well above that line, so they don’t mark the standard boundary.

The key idea is the boundary between soldering and brazing is defined by the temperature at which the filler metal melts. Soldering uses filler metals that melt at relatively low temperatures, while brazing requires higher heat so the filler metal melts and flows into the joint. That dividing temperature is about 450°C, which is roughly 842°F. Since 840°F is a close approximation, it serves as the practical cutoff between soldering and brazing. The other temperatures are either well below or well above that line, so they don’t mark the standard boundary.