What are brazing and its characteristics?

flux cored brazing wire

flux cored brazing wire

Brazing, like welding, is one of the oldest ways to join metals together.

What is brazing? What are definition and characteristics of brazing? Many people are still unclear about these, and now let’s tackle those problems in this one article.

Definition of brazing

Brazing is a traditional metal joining process in which two or more base metals are joined together by heating and melting a filler metal and filling in the joint. The biggest difference between brazing and welding is if the base metals melt or not.


Characteristics of brazing


  1. The melting point of brazing filler metal is lower than that of the base material or the welded part.
  2. When the brazing filler metal melts, the base material does not melt
  3. The filler metals used in the brazing process are usually self-flux.
  4. Brazing can join dissimilar metals together, such as brazing aluminum and copper.
  5. There is no strict limitation or requirement on the thickness difference of the workpiece.
  6. Lower brazing temperature, smooth joints, small changes in microstructure and mechanical properties, small deformation, and accurate workpiece dimensions.
  7. Some brazing methods can simultaneously weld multiple weldments and have high productivity.
  8. Simple brazing equipment, low production investment cost.


Compared with welding joints, brazing joints has several disadvantages.

  1. Low strength of joints
  2. poor heat resistance of the joints
  3. strict cleaning requirements before brazing

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