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One should go for brazing when permanent and strong metal to metal joints is required. Mechanically fastened joints such as threaded, staked, riveted, etc. does not have the strength similar to that of brazed joints. Also the braze joints posses the high resistance to shock and vibration, or leak-tightness.

Metal adhesive bonding and soldering will give you permanent bonds, but generally neither can offer the strength of a brazed joint. Strength of braze joint is equal to or greater than that of the base metals themselves. Joint streght produced by brazing can withstand temperatures more than 90 deg Celsius. If you want metal joints that are both permanent and strong, it’s best to narrow down your consideration to welding and brazing.

Welding and brazing both use heat in the joining process. They both use filler metals. They can both be performed in mass production of products. Consider brazing when the following are required in the metal joining,

  • Joint strength
  • Good joint appearance
  • Lower temperatures
  • Lower cost
  • Maintains integrity of base metals
  • Dissimilar metals easily joined
  • Operator skill easily acquired
  • Process easily automated

Which method to go for Welding or Brazing ? Is depends on the following factors,

  • Size of assembly - Bigger the size of the assembly, better is to for brazing.
  • Thickness of base metal sections - Chose for varying sections for brazing.
  • Spot or line joint - Different sections and joints can be easily brazed.
  • Metals being joined - Various kinds of metals can be easily joined by brazing.
  • Final assembly quantity needed - Quantity is more better to go for brazing.

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