It is a method of joining two similar or dissimilar metals by means of fusible alloy or metals called solder. The melting point of filler metal is below 450°C. It is used for obtaining a leak proof joint or a low resistance electrical joint.
Soldering is of two types.
Soft soldering: It is used is sheet metal works for joining parts which are not bearing excessive loads.
Hard soldering: It is used where a stronger joint is required.
In soldering process lap joints are preferred. The composition of some of the solders is listed below.
|S. No.||Type of solder||Lead (%)||Tin (%)|