Difference Between MIG Welding and TIG Welding (With Table)

Welding is a process in which parts are joined together by heating the object’s surface to the melting point. Depending on the product specifications and the part, industrial professionals employ various techniques of welding to create the required assemblies.  

Depending on the creation of workpieces, arc welding processes are also very. So, it is necessary to choose the right one for the project’s success. Both the MIG and TIG welding form the weld with the help of an electric arc. Both the techniques are different from each other, and choosing the wrong one can create more headaches. 

MIG Welding vs TIG Welding 

The main difference between welding of MIG and TIG is that MIG welding is a process in which an electrode and the workpiece form an electric arc. On the flip side, TIG welding is a process in which a non-consumable tungsten electrode produces the weld. MIG welding process is faster than TIG welding, whereas TIG welding is slow in comparison to other processes.  

MIG or Metal inert gas or GMAW (Gas metal arc welding) or MAG (metal active gas).  MIG welding was invented by Humphry Davy’s in 1949. MIG welding is a process to form an electric arc between an electrode and a workpiece. With the help of an inert shield (nitrogen), the welded area is safeguarded from atmospheric contamination.  

TIG or tungsten inert gas or GTAW. TIG welding was invented by Rusell Meredith in 1942. It is a process of arc welding in which non-consumable tungsten electrodes are used to produce the weld. Inert shielding gas such as argon gives protection to the welded area from atmospheric contamination. 

Comparison Table Between MIG Welding and TIG Welding 

Parameters of ComparisonMIG WeldingTIG Welding
InterpretationIt is a welding process in which an electrode and a workpiece form an electric arc.It is a welding process in which a non-consumable tungsten electrode produces the weld.
InventedIn 1949In 1942
InventorHumphry Davy’sRussell Meredith
MalleabilityHarderSofter
Deposition rateHigherLower

What is MIG Welding? 

MIG is an acronym for metal inert gas welding. It is a process in which weld is produced with the help of an electrode and a workpiece.  An electric arc is formed between both the components like wire and metal and heated until its melting point. While doing this process, with the help of a welding gun a shielding gas is fed to protect the wire from atmospheric contaminants.  

MIG welding generally relies on the shielding gas flow, so to be not get disturbed by the wind it is practiced inside. If the welding process is performing in the field, then the erection of tents or plastic shields is required. From lawn art to the production of automobiles it is used in everything.  

For the industries, MIG building has become a staple for several reasons. The process of welding can either be semi-automated or fully automated. An arc generator is used in semi-automated, whereas robotic arms are used instead of human welders in fully automated. As a result, MIG welding is used in many fields.  

MIG welding is quite easy to learn, so training in MIG welding can be completed in a short amount of time. This kind of welding is also fast in process and requires almost no cleanup. MIG Welding is used in automobile assembly, construction, railroads, pipe signal fabrications, and other areas. 

What is TIG Welding? 

In TIG welding, an arc is made by a welder between the metal and the electrode of non-consumable tungsten. A molten weld pool is formed when the base metal is hit by the arc. A filler metal’s thin wire is hand-fed slowly into the weld pool. All the while, inert shielding gas is fed to protect it from atmospheric contamination.  

As compared to other types of processes, TIG welding is used for more metals. That’s why several industries rely on this kind of welding. In the aerospace industry, TIG welding is used for the construction of airplanes and spacecraft. It is also used in repair shops of auto body and sculpture welding.  

In TIG welding, a welder can control amperage and heat with precision using a thumb or foot remote control switch. TIG welder is easy to control vet excellent dexterity over the process due to a thin welder. That’s why TIG building is preferred for projects where detailed curves or designs are required.  

This process of welding works well on thin metal or pieces due to the low amperage usage by torch. With the combination of the remote-control switch and the low amperage, it is easy for a welder to switch from thin pieces to thick ones quickly. The world produced by TIG is clean and slag-free. 

Main Differences Between MIG Welding and TIG Welding 

  1. In terms of suitability, MIG welding is suitable for homogeneous welding. On the flip side, TIG welding is suitable for autogenous mode.  
  2. When it comes to the usage of gases, MIG welding uses nitrogen, oxygen, helium end mixture of three of them. Only argon gas is used in TIG welding.  
  3. The process of MIG welding is faster than TIG welding. On the other hand, the process of TIG welding is slow in comparison to other processes.  
  4. MIG welding is generally carried out in DCEP or AC polarity for the increase in filler deposition rate, whereas TIG welding is either carried out in DCEN or AC polarity for the increase in electrode life.  
  5. The electrode-cum filler in MIG welding comes in the form of a very long wire wound in a pool with a small diameter. But the TIG welding filler comes in the form of short length rod with a small diameter. 

Conclusion 

It can be concluded that MIG and TIG welding are both the welding processes that form the weld with the help of an electric arc. MIG welding is a process in which an electrode and a workpiece form an electric arc. On the other hand, TIG welding is a process in which a non-consumable tungsten electrode produces the weld.  

Nitrogen, oxygen, helium, and a mixture of them are used in MIG welding, while argon gas is used in TIG welding. When it comes to malleability, MIG welding is harder, whereas TIG welding is softer. So, the right technique for the right project matters a lot otherwise whole project can cause more headaches. 

References 

  1. https://www.sciencedirect.com/science/article/pii/S0924013699004355
  2. https://books.google.com/books?hl=en&lr=&id=mr5QAwAAQBAJ&oi=fnd&pg=PP1&dq=mig+welding&ots=-G2_8pA8fk&sig=0eup5ccANH9CdHw1fryWXBGE6zg
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