Brazing is a process for joining similar or dissimilar metals using a filler metal that typically includes a base of copper combined with silver, nickel, zinc or phosphorus. Brazing covers a temperature range of 900ºF - 2200ºF (470ºC - 1190ºC). Brazing differs from welding in that brazing does not melt the base metals, therefore brazing temperatures are lower than the melting points of the base metals. For the same reason, brazing is a superior choice in joining dissimilar metals. Brazed joints are strong. A properly-made joint (like a welded joint) will in many cases be as strong or stronger than the based metals being joined.

Advantages of Vacuum Brazing :-

1. Extremely clean, superior, flux-free braze joints of high integrity and strength.
2. No oxidation or scaling