Tuesday, July 5, 2016

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Advantages & Disadvantages of Soldering and Brazing

Advantage of Soldering & Brazing: 
  • Low temperature. Since the base metal does not have to melt, a low-temp heat source can be used. This minimized distortion and creates a smaller heat-affected zone (HAZ).
  • Joints can be made be permanently or temporarily. Since the base metal is not damaged, parts can be dis-assembled at a any time by simply supplying heat. The parts then can be reused. The joint made by soldering or brazing process is solid enough to be permanent.
  • Metals of dissimilar can be joined. By using soldering and brazing process dissimilar metals can be easily joined, such as aluminum to brass, copper to steel and cast iron to stainless steel. It is also possible to join nonmetals, i.e. ceramics can be easily brazed to each other or to metals.
  • Speed of joining. Parts can be pre-assembled and furnace soldered or brazed in large quantities. A lower temperature means less time in heating.
  • Less chance of damaging parts. A heat source can be used that has a maximum temperature below that which may cause damage to the base material.
  • Parts of varying thickness can be joined. Very thin parts or a thick part and a thin part can be easily joined without burning through or overheating them.
  • Easy realignment. Parts can be easily realigned by reheating the joint, re-positioning the parts and allowing the filler metal to solidify.
Disadvantage of Soldering & Brazing:
  • Low Strength
  • Damaged under high temperature conditions.


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