Difference between brazing and soldering

The difference between brazing and soldering has been one of the most asked questions among engineering pupils in our world today. The two joining process has some great similarities, but many metallurgical differences.

Brazing vs soldering

These processes are used to join metals together and create a bond between the metal being joined. However, they use different techniques to achieve their objectives.

Today we will be going deep and clarifying the difference between “brazing and soldering”.

Brazing vs soldering

Soldering is a joining process that uses solder to join two metal parts together. It uses much lower temperatures than brazing, typically 300-500 degrees Fahrenheit range. Although some types of soldering are a bit higher, brazing typically prevails at 1200-2300 degrees Fahrenheit. In soldering the filler metals melts completely below 450C while in brazing it melts above.

These two processes distribute the molten metal using capillary action between the base metals to be joined. These metals are expected to be completely free from oil, dirt, etc.

Brazing vs soldering in the metallurgical aspects; the higher temperatures required in brazing may lead to different joint properties in service. Brazing often results in extensive interaction between the filler metal and the workpieces. In soldering, the lower temperatures allow only minimal inter-alloying of the filler metal with the workpieces being joined.

Differences between the two processes may also occur when putting to service, in at least two ways;

Joint strength: the base metal that contains solder joints will typically be stronger than solder. However, failure typically occurs in solder joints if they experience stress in service.

A higher temperature is required in brazing, making it prior to failure and if there is any, it occurs in the base metal. Due to the higher temperature brazing uses, metallurgical reactions and alloying are very intense than those that occur in soldering. In brazing joints, the joint exceeds or approaches the strengths of the base metals joined.

Fatigue resistance: a good brazed joint will be capable of handling the fatigue and stresses placed on the joint. The stresses may be by thermal cycling or mechanical shock. On the other hand, solder joints in similar conditions would fail, due to the low degree of alloying.

Having to know the difference between brazing and soldering processes. You should have in mind that there are a number of similarities between them. And the temperature differences between the two result in different behavior when put into service.

See my recommendation on brazing

Brazing and soldering difference

I hope you found this post interesting and that you’ve attained knowledge. If so, you can freely give your point in our comment section and please share with other students. Thanks!

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