Brazing vs Soldering vs Welding (9 Difference you must know)

Brazing vs Soldering vs Welding Difference between

Confused between Brazing, Soldering and Welding?

Don’t worry, I have prepared a comparison table of Brazing vs Soldering vs Welding.

So whether you want a comparison of Brazing vs Soldering or Brazing vs Welding or Soldering vs Welding, just look at the differences given below in tabular form.

BrazingSolderingWelding

1) Definition: Brazing is defined as a process of joining two similar or dissimilar metals by using a fusible alloy called “spelter”.

1) Definition: Soldering is defined as a process of joining two metal pieces by adding an extra material or alloy called “solder”.

1) Definition: Welding is defined as a joining process in which two or more parts are joined together by using a very high amount of heat which melts the parts & filler rod and fuses them with each other which ultimately forms a strong joint on cooling.

2) Filler material used in brazing is called spelter.

2) Filler material used in soldering is called solder.

2) Filler material used in welding is called welding rod or welding electrode.
3) Spelter may be copper based alloy or silver based alloy.3) Soft solder contains 37% lead and 63% tin.Plumber’s solder contains 70% lead and 30% tin.Electrician’s solder contains 58% lead and 42% tin.3) Welding electrodes contain inner core metallic wire made of rimming quality steel which is covered with a flux coating material.
4) In brazing operation, the workpiece is heated below its melting point.4) In soldering operation, workpiece is not heated.4) In welding operation, the workpiece is heated to its melting point.
5) In brazing operation, the temperature ranges from between 450 °C to 600 °C.5) The soldering process occurs at a temperature range below 450 °C.5) In welding operation, the temperature of the weld zone can reach up to 3800 °C.
6) The change in mechanical properties of the base metal is very negligible.6) There is no change in mechanical properties of the base metal.6) Change in mechanical properties of the base metal is higher as the base metal is exposed to very high temperatures.
7) Strength of the brazed joint is higher than solder joint but lower than the welded joints.7) Strength of the solder joint is very less as compared to brazed joints and welded joints.7) Strength of welded joints is highest in comparison with brazed joints and solder joints.

8) Uses: Used for fastening of similar or dissimilar metals, pipes, fitting of carbide tips in tools, etc.

8) Uses: Used for connections in electrical PCBs and other electrical instruments.

8) Uses: Used in most of the manufacturing industries like home applications, mining equipments, boilers, furnaces, air conditioning units, and many more components.
9) Brazing is classified as;
Torch brazing,
Furnace brazing,
Induction brazing,
Resistance brazing,
Dip brazing and 
Laser brazing
9) Soldering is classified as;
Soft Soldering and 
Hard soldering
9) Welding is classified as;
Gas welding,
Arc welding,
Resistance welding,
Solid state welding,
Thermo chemical welding and
Radiant energy welding
10) Commonly used brazing flux are;
Chlorides, 
Fluorides and 
Boric acid
10) Commonly used soldering flux are;
Zinc chloride,
Hydrochloric acid and
Alcohol resin
10) Commonly used flux coatings on electrodes are;
Cellulose type,
Rutile type,
Acid type,
Acid rutile type,
Oxidizing type,
Basic type.
11) Finished part obtained by brazing is smooth.11) Finished part obtained by the soldering process is smooth.11) Finished part is not so smooth as compared to parts obtained by brazing or soldering.

So this is a simple tabular form showing the comparison of Brazing vs Soldering vs Welding.

I hope you have understood the difference between brazing, soldering and welding.

From this comparison, you can easily select the suitable metal joining process for a particular application.


External links:
Brazing image credits: Cyfac, CC BY-SA 3.0, via Wikimedia Commons

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