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Flux-Cored Solder Wire

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Solder wire is made from metal alloys with a low melting point. It is used to create permanent bonds between metal components. Solder wire is melted in order to wet the parts of the joint. The solder then cools down and connects the parts.

Flux-cored solder wire is hollow wire which contains flux. The flux is released when the wire melts, improving the soldering process. Flux-cored solder wire is available in both leaded and lead-free varieties. It comes in a wide range of alloys and diameters. The wire is wrapped around a spool.

ConRo Electronics offers a wide choice of flux-cored solder wire from major manufacturers such as Indium.

Conro Electronics is an authorized distributor for Indium.

Solder flux is a chemical cleaning agent. Its purpose is to remove oxides and impurities from surfaces before soldering. Using flux improves the wetting characteristics of the molten solder. This makes the soldering joints stronger and provides better electrical properties.

The flux used in cored solder wire is usually rosin flux or no-clean water soluble flux. Solder wire with acid flux core is also available. However, acid flux is very corrosive. This makes it unsuitable for electronics.

Using flux-cored wire when soldering provides users with several key advantages:

  • No need to apply flux before soldering; this allows to save time and increase productivity.
  • Faster wetting of the solder joints leads to clean, strong welds.
  • Less flux splatter and residue.
  • Improved electrical properties.
  • Reduced carbonisation extends working life of soldering tips.
  • Flux prevents subsequent oxidisation of the surfaces.

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