Brazing, Soldering and Welding: What Is the Difference?

In brazing and soldering, the filler metal melts while the base metal remains solid. Most welding processes also melt the base metal, although this distinction does not apply to every welding method.

The conventional boundary between soldering and brazing is a filler-metal melting temperature of 450 °C. Brazing takes place above this temperature and below the melting temperature of the components.

The joining method depends on the component materials, thermal conditions and mechanical requirements. These processes are not interchangeable.