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Difference Between Soldering, Brazing and Welding

Soldering, brazing, and welding operations are used for joining two or more pieces of metal. All of these operations are different in terms of base material to be joined, joining temperature and filler material used.

 


Welding

Welding is a joining operation used to join two or more similar material (usually metal or thermoplastic parts) by melting base material or by using filler material rod. Strength of welded parts is similar to the base material. Sometimes pressure is also used along with heat to weld parts (e.g. spot & seam welding).

Welding is relatively done at higher temperatures as compared to brazing and soldering.

Welding machines are required for doing welding operation.

Types of Welding

  • Arc Welding
  • GAS Welding
  • Inert Gas Welding (MIG and TIG)
  • Electron Beam
  • Laser Welding
  • Spot / Seam Welding

 


Brazing

Brazing is a metal joining operation in which two or more metal parts are joined together by melting and flowing a filler metal into the joint.

Brazing Filler metal rod always have lower melting temperature compared to base metals.

Brazing is done at higher temperature and two metals are joined using a brazing filler rod as compared to welding where base material is melted and fused together.

Different metals with considerable strength can be joined with brazing. Brazing flux and filler rod is used for joining two or more metals with brazing operation. 

 


Soldering

Soldering is a joining operation (usually metals) by melting and flowing a filler metal (also known as solder wire) into the joint. Filler metal always have lower melting temperature compared to base metals. Soldering flux is required for doing good quality solder.

Brazing is done at higher temperatures as compared to soldering or we can say that soldering is a low temperature brazing.

Gold, silver, copper, brass, and iron metals can be soldered. Soldering joint is not as strong as brazed or welding joint. Soldering is commonly used to join electrical components.

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