Metal joining

Metal joining is a controlled process used to fuse metals. There are several techniques of metal joining such as:

Soldering is the process of joining two metal objects together by third soft metal alloy which is called solder. Solder is a metal alloy which melts at a lower temperature than the metals being soldered. Two types of solder are commonly used. One is a soft solder, which is an alloy of tin and lead. The other is a hard solder, which is an alloy of copper and Zinc. This usually called spelt or silver solder.

Brazing is a joining process in which a filler metal is melted and drawn into a capillary formed by the assembly of two or more work pieces. The filler metal reacts metallurgically with the workpiece(s) and solidifies in the capillary, forming a strong joint. Unlike welding, the work piece is not melted.

Welding is the most economical and efficient way to join metals permanently. It is the only way of joining two or more pieces of metal to make them act as a single piece. There are many ways to make a weld and many different kinds of welds. Some processes cause sparks and others do not even require extra heat. Welding can be done anywhere… outdoors or indoors, underwater and in outer space.

Because welding is very important in this item, the title is considered as welding and it is more discussed.