What is MIG welding?

Are you getting a need for welding? Well, the very first thing which you should ask yourself is what type of welding you want to get. There are multiple welding types. And obviously, all of these are better in some aspects than others. By far the most well-known and universal welding type is MIG welding. Whether you need to weld a thin gauge metal sheet or a heavy steel pipe, MIG can do it all. Any professional MIG welder can handle deep, smooth and beautiful weld in a more effective way.

However, do you want to decide whether MIG welding can be a better option for you or not? For this, you must understand what is MIG welding. So, in this article, we will learn more about this widely used MIG welding, its applications, and benefits, etc. So, without any further delay, let’s have a look at the details given below to know more about MIG welding.

What is MIG Welding?

The second name of MIG welding is Gas Metal Arc Welding (GMAW). However, this is an arc welding process. A solid wire electrode is being fed via a welding gun continuously to form an electron arc. While this arc will cause heat and help the metal to melt. In this process, welders normally join two base materials together which can let them join. However, the welding area is normally protected with the shielding gas by sending through a welding gun. This can protect the weld pool from any contamination.

This technique was introduced in the United States of America in the year 1949, firstly for aluminum welding. However, the weld pool and arc are based on the bare wire electrode. Normally, helium gas is protecting this bare wire electrode. However, from 1952, the process of MIG welding also became popular in the UK. While, at present, MIG welding is a better alternative to MMA and offering high productivity and high deposition rates.

How does MIG welding work?

MIG Welding is a process that uses electricity to melt and join metal. However, it uses a lot of electricity for electric arc creation between metal and electrode wire. The arc can melt the wire which later deposited to create. However, after removing heat, the weld pool gets cooler and solidifies to form a new fused metal piece. All of these happen at the MIG torch nozzle and a handheld device that inert shielding gas and feeds electrode wire at the same time. 

What is MIG welding used for?

MIG gas normally used in multiple industries. Most importantly, it is accounting for more than 50% of the entire weld metal deposits. As compared to various other welding techniques, MIG welding is more preferable welding choice. It is because it comes with higher flexibility, higher suitability for mechanization, and greater deposition rates. However, it is also important to understand while MIG welding is more effective for squirting. But a welder with a higher degree of skills is required to complete the welding process in a more effective way.

What gas is used for MIG welding?

Well, when it comes to MIG welding, a shielding gas is important to consider. While, for MIG, general-purpose shielding gases are a mixture of Oxygen, Carbon dioxide, and Argon. However, a more special gas mixture can also contain helium.

However, here is the detail of the gases which are more effective for various metals to use:

For steel

  • Argon +5 to 25% Carbon dioxide
  • Argon +2 to 5% oxygen
  • Carbon Dioxide

For Non-ferrous metals including nickel or copper alloys and aluminum

  • Argon and helium
  • Argon

When we compare argon-based gases with carbon dioxide, then normally argon-based gases are more tolerant to generate lower spatter levels. Even more, these are also more easy-going to parameter settings along with dip transfer mode. However, there exists a higher risk of fusion defects lack because these are colder gases.

Even more, carbon dioxide is not a suitable gas for open arc because of its high back plasm force. Therefore, argon-based gases which are containing carbon dioxide or oxygen are employed normally.


Why shielding gas is essential?

As shielding gas is important to perform various functions. These functions normally including the arc plasma formation. Other than this, it can stabilize the arc roots on the surface of the material. Even more, it can also ensure a smoother transfer of molten droplets to the wed pool from the wire. Thus, this is clearly showing that shielding gas contains a substantial effect on metal transfer and arc stability. Even more, it is also affecting the weld pool behavior particularly, in the presentation.

Where MIG is not a good option to use?

As not all the welding techniques are good for all types of welding applications and MIG welding is no exception. Well, MIG welding is not a suitable technique for construction and agricultural applications. Especially, where welding has to be done in the blowing wind or center of an exposed field. However, a windshield can do a better job to make things easier. However, MIG welding is always better to use in a more controlled environment.

Is it necessary to hire a MIG welder?

Although MIG welding is easier to perform but it can cause various issues such as burn-through, weird positions, etc. Therefore, it is always a better choice to hire a professional MIG welder. This will certainly let you get done with the process in a more effective way. Hiring a professional can let you stay stress-free in the best possible way.


From the above description, you may have gotten a better idea about What is MIG welding. And also, about the flexibility of MIG welding. However, it is also important for you to know that MIG welding is quite easier to learn. Even more, it can help you to complete the welding process faster as compared to other welding techniques. It is because it will cost you lower than others and a better option for longer productions. Most importantly, it can also suit the lower volume work too in an effective way.

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