Difference Between Soldering, Brazing & Welding

Differences between soldering, brazing and welding explained.

Soldering, brazing and welding are different technical processes to join two metallic workpieces.

What is Soldering?

Soldering

Soldering

Soldering is a process where to parts are joined together with a filler material that has a lower melting temperature than the parts base materials. Moreover, soldering does not melt the base materials.

Furthermore, soldering is for example used for plumbing, jewelry or electronic circuit boards.

Soldering – differences to brazing and welding

In contrast to brazing, soldering is done at a lower temperature. According to the American Welding Society (AWS), soldering is usually done up to a temperature of 840°F (= 450°C).

Also, in contrast to welding, soldering does not melt the base material.

Typical materials that are used as a base material for soldering are brass, iron, gold and silver. In the past leaded solder wire was used for soldering. Nowadays leaded solder wire is replaced by lead-free solder wire which is not as harmful to ones health.

Soldering is an essential process to join chips and other conductors in electronic circuit boards.

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What is brazing?

Brazing is a metal-joining process where you join two metallic items together. This is done with the help of an additional filler material. The filler material has a lower melting point than the workpieces.

With brazing you can join two different metals that would not mix during welding.

Please take a look at the brazing made easy video below, to see how brazing works.

Brazing – differences to welding and soldering

In contrast to welding, the metal of the workpieces does not melt during brazing.

In contrast to soldering, brazing requires higher temperatures and a very close gap because the brazing process utilizes the capillary effect. When heated above the melting temperature, the filler metal will fill out the gap completely and adhere to the two joined parts.

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What is welding?

cool welding helmet

Welding

Welding is another process to join two different parts together. The joining is done with the help of very high heat and can be done in combination with force. Most of the times metals are being welded together, but it is also possible to weld plastics with appropriate equipment.

The required weld energy comes out of the welding torch when welding with oxy-acetylene or from the welding arc when using electrically powered welding machines.

There are several well-known welding processes like MIG/MAG welding, TIG welding, Stick welding, Laser-welding and Oxyacetylene welding.

As welding works with high energy, you will need good welding clothing to protect yourself from weld sparks and spatter.

Welding – differences to soldering and brazing

In contrast to soldering and brazing, the base material melts and mixes with the weld partner as well as the weld wire during the welding process.

In contrast to soldering and brazing, welding gives joints with a much higher strength and is used for structural and safety-relevant components.

Image Credits: Pixabay, Pixabay/Skeeze

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