Filler materials used in brazing copper tube melt at temperatures between 1,100°F and what temperature?

Filler materials used in brazing copper tube melt at temperatures between 1,100°F and what temperature?

• A. 1,100°F and 1,300°F
• B. 1,200°F and 1,400°F
• C. 1,500°F
• D. 1,600°F

Answer: (C)

Brazing uses filler metals that melt at temperatures high enough to flow into joints, but well below the base metals being joined. For copper tube, the filler alloy is chosen to melt in a moderate range so you can heat the joint to braze temperature and allow the filler to flow by capillary action without melting the copper itself (copper melts around 1,981°F). The typical melting range for these brazing fillers used with copper is about 1,100°F to 1,500°F. That upper limit of 1,500°F is the best match among the options, reflecting the common maximum melting point of standard brazing alloys for copper. The other upper limits (1,300°F or 1,400°F) are narrower, and 1,600°F would exceed the usual range for these fillers.

Brazing uses filler metals that melt at temperatures high enough to flow into joints, but well below the base metals being joined. For copper tube, the filler alloy is chosen to melt in a moderate range so you can heat the joint to braze temperature and allow the filler to flow by capillary action without melting the copper itself (copper melts around 1,981°F).

The typical melting range for these brazing fillers used with copper is about 1,100°F to 1,500°F. That upper limit of 1,500°F is the best match among the options, reflecting the common maximum melting point of standard brazing alloys for copper. The other upper limits (1,300°F or 1,400°F) are narrower, and 1,600°F would exceed the usual range for these fillers.