Classification by melting temperature (brazing and soldering)

This section explains the difference between brazing with brazing filler metal, and soldering with solder. As explained below, each of these methods affects factory automation welding processes differently.

Brazing and soldering are classified by the melting temperature of the filler material. Brazing uses filler materials that have melting temperatures of 450°C or higher; and soldering uses solders (soft filler materials) that have melting temperatures below 450°C.

Classification by melting point Brazing/soldering method
Brazing (Melting point: 450°C or higher) A method of welding that uses filler materials while melting the base material as little as possible.
  • Open air brazing(torch brazing, induction heating brazing, etc.)
  • Controlled atmosphere brazing(furnace brazing, non-oxidizing atmosphere brazing, etc.)
  • Brazing using light energy(laser brazing)
Soldering (Melting point: Below 450°C) A method of welding that uses solders (soft filler materials) that have low melting points while melting the base material as little as possible.
  • Manual work using a soldering iron
  • Soldering by robots or automatic machines
  • Soldering (soft brazing) using light energy (light beam soldering)

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