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While brazing is often the
most appropriate joining method, there are many factors
that should be considered before deciding which method to
use.
The Joint’s Purpose
Some joints must be incredibly strong, leak-tight,
permanent and highly resistant to shock and vibration. An
example might be a joint found in scaffolding
that is used to support equipment and construction crews
working on high-rise buildings. In this case, brazing
is often the right choice. For joints that either don’t
require the same degree of strength or permanence, or that
may require future dismantling, mechanically-fastened alternatives
such as riveting may be more cost-effective. An example
might be the connection between pieces of duct work and
a main HVAC system.
Type of Joint
Since brazing uses capillary action to draw the filler metal
across the joint, the operator is not required to trace
the joint manually. In this case, brazing
a line joint can dramatically reduce the risk of error and
will create a smoother appearance than most other joining
methods.
Metals Being Joined
Brazing is ideal for dissimilar metals,
as well as assemblies using thinner metals susceptible to
damage. Since brazing does not heat base
metals to their melting point, it minimizes the risk of
warping, overheating and melting.
Appearance
If you manufacture a product that must be both visually
appealing and functional, such as safety equipment, clean
brazed joints will give the finished product
a smooth, even appearance.
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