The materials used for welding are different. Copper welding and silver welding belong to brazing
Brazing is a kind of welding method in which the welding material basically does not melt, but only the flux melts or does not melt.When the flux melting point is low, it is called soft soldering, such as tin soldering;Also known as Soldering, the solder has a melting point below 450 degrees.
When the flux melting point is higher, it is called brazing, such as brazing;When the flux does not melt but diffuses through heating, it is called diffusion welding.
Brazing refers to the solder melt after the capillary effect, so that the two workpiece joint of a welding method, and the base material is not melted, Brazing, also known as Brazing, the solder melting point is higher than 450 degrees.
As for silver soldering, it depends on the solder you use