Soldering is a thermal process for metallurgically joining materials in which a liquid phase is formed by melting a hard solder.
The solidus temperature of the base material is not reached. Soldering produces a non-detachable, metallurgical joint.
The material used for joining is typically an easily melted metal alloy, the hard solder. It enables the creation of a metallic connection between two metallic components. One characteristic of a soldered joint is the intermetallic joint. In this thin layer, the base material and the solder form an alloy and thereby generate a solid connection.