Difference Between Welding, Soldering and Brazing

Welding, brazing and soldering are the methods of joining two or more pieces of metal and others materials. They are also used to fill gaps in metal parts. Each types of joining process has its own significance. Metal joining process to be applied for joining two parts depends on many factors. Below see the comparison of welding, brazing and soldering in aspects like strength, temperature requirement, change in properties, cost involvement, heat treatment etc.
Tabular Difference Between Welding ,Soldering and Brazing Tabular Difference Between Welding ,Soldering and Brazing 
Tabular Difference Between Welding ,Soldering and Brazing

 

Tabular Difference Between Welding ,Soldering and Brazing 

S.No
Welding
 Soldering
Brazing
1
Welding joints are
strongest joints used to bear the load. Strength of the welded portion of
joint is usually more than the strength of base metal.
Soldering joints are
weakest joints out of three. Not meant to bear the load. Use to make
electrical contacts generally.
Brazing are weaker
than welding joints but stronger than soldering joints. This can be used to
bear the load up to some extent.
2
Temperature required
is 3800 degree Centigrade in Welding joints.
Temperature
requirement is up to 450 degree Centigrade in Soldering joints.
Temperature may go
to 600 degree Centigrade in Brazing joints.
3
Work piece to be
joined need to be heated till their melting point.
Heating of the work
pieces is not required
Work pieces are
heated but below their melting point.
4
Mechanical
properties of base metal may change at the joint due to heating and cooling.
No change in
mechanical properties after joining.
May change in
mechanical properties of joint but it is almost negligible.
5
Heat cost is
involved and high skill level is required.
Cost involved and
skill requirements are very low.
Cost involved and
sill required are in between others two.
6
Heat treatment is
generally required to eliminate undesirable effects of welding.
No heat treatment is
required.
No heat treatment is
required after brazing.
7
No preheating of
workpiece is required before welding as it is carried out at high
temperature.
Preheating of
workpieces before soldering is good for making good quality joint.
Preheating is
desirable to make strong joint as brazing is carried out at relatively low
temperature.

 

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