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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 (%) |
|
1. |
Soft solder |
37 |
63 |
|
2. |
Medium solder |
50 |
50 |
|
3. |
Electrician solder |
58 |
42 |
|
4. |
Plumber’s solder |
70 |
30 |
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