SOLDERING AND BRAZING

Soldering and brazing are allied joining processes. The main difference between welding on one hand and soldering and brazing on the other is that, in either soldering or in brazing process, the temperatures used are not high enough to cause melting of parent metals to be joined. The difference in soldering and brazing is again based on temperature considerations. In soldering temperatures up to 427°C are used and in brazing process, temperatures above 427°C are employed. Strengthwise soldered joints are weakest, while welded joints are strongest. Brazing produces joints with intermediate strength.