Brazing is a process of joining two similar or dissimilar metal pieces by means of heat and a special non-ferrous filler metal known as a spelter. During the brazing process, the filler metal flows into the gap between close-fitting parts by capillary action. The filler metal is brought slightly above its melting (liquidus) temperature while protected by a suitable atmosphere, usually a flux.

Advantages of Brazing;
- Hard soldered joints are stronger.
- Suitable for combining two different materials.
- It is usually a one-operation process.
- Suitable for joining porous parts.
- The surface does not create tension.
- It provides the opportunity to work at very low production tolerances.
- Products with low unit costs are obtained.
- Does not require cleaning after brazing.