The act of joining two [[metal]]lic surfaces together by [[melting]] a metal or alloy (referred to as solder) with a lower melting point into the space between them. This can be done by heating both the solder and the surfaces using a [[soldering iron]], a heat gun, or a [[fire|flame]]. Differs from [[welding]] in that the metals to be joined are themselves not heated all the way to melting point.

When higher melting point solder is used, it is referred to as "brazing".
soldering