Difference Between MIG Welding and TIG Welding ?

MIG welding and TIG welding operate under a similar principle; heat generated by an electrical current melts the base materials and/or bonding materials, which, when cooled, form a solid joint. Despite similarities between the two processes, they remain distinct in their benefits and best use cases.

What is MIG Welding?
Metal Inert Gas (MIG) is also known as gas metal arc welding (GMAW). Metal inert gas welding (MIG Welding) is one of several welding techniques that use electricity to melt and join pieces of metal. This is done by heating the metals with the help of an arc. This arc is formed between the surface to be welled and a continuously fed filler electrode.

What is TIG Welding?
The TIG process uses the heat generated by an electric arc between the metals to be joined and an infusible tungsten-based electrode, located in the welding torch. The arc area is shrouded in an inert or reducing gas shield to protect the weld pool and the tungsten electrode.
The filler metal as a rod is applied manually by the welder into the weld pool.
TIG welding is especially suited to sheet materials with thicknesses up to about 8 or 10 mm. 

Here are the some Important Difference between MIG & TIG Welding's






This welding is known as metal inert gas welding.

This known as tungsten inert gas welding.


Metal rod is used as electrode and work piece used as another electrode.

Tungsten rod is used as electrode.


It is gas shielded metal arc welding.

It is gas shielded tungsten arc welding.


Continues feed electrode wire is used which are fast feeding

Welding rods are used which are slow feeding.


The welding area is flooded with a gas which will not combine with the metal.

Gas is used to protect the welded area from atmosphere.


MIG can weld materials such as mild steel, stainless steel and aluminum. A range of material thickness can be welded from thin gauge sheet metal right up to heavier structural plates.

TIG weld things like kitchen sinks and tool boxes. Pipe welding and other heavier tasks can also be performed, you just need to have a unit that is capable of putting out the amount of power that you need.


MIG requires consumable  metallic Electrode.

It used non consumable tungsten electrode.


Electrode is feeded continuously from a wire reel.

It does not require electrode feed.


DC with reverse polarity is used.

It can use both A.C and D.C.


Filler metal is compulsory used.

Filler metal may or may not be used.


It can weld up to 40 mm thick metal sheet.

Metal thickness is limited about  5mm


MIG is Comparatively faster than TIG.

TIG is as slow welding process.

Note :-
Both MIG and TIG welding can be used on a wide range of metals, with MIG welding more suitable for thick materials and TIG more appropriate for thin materials. Typical weld materials include aluminum, carbon steel, and stainless steel.

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