Best MIG Welding Gas You Can Use in 2021

Metal Inert Gas, commonly known as MIG welding, is a technique in which a solid wire known as an electrode is heated fed within the welding pool. This process proceeds with the help of a welding gun. 

Firstly, to form a proper welding joint, the base metal is melted. The welding gun provides a combination of gas and electrode, which further gets paid by the air-borne contaminants forming an excellent joint.

But how can you find the best MIG welding gas right for your job?

Best MIG Welding Gas In 2021
Best MIG Welding Gas To Use In 2021

You can use several options, but different gases come with a different scope of use. You need to have the required knowledge and expertise to drive up the best possible results. If you don’t know, we are here to rescue you.

We have gathered valuable information appropriate for your needs. So, without wasting any time, let’s dive into it.

How to Select the Best MIG Welding Gas 

You can find several MIG welding applications and usage around yourself. So, with all of the variety available, you need to assess your needs and objectives for selecting the best suitable gas.

We have broken it down for and tried to mention some of the core points or features you should look for before choosing your best MIG welding gas like;

Keep a close eye on these features before choosing the best MIG welding gas for your projects

Best MIG Welding Gas to Use 


It is one of the most popular and widely used for MIG welding. Argon gas is prevalent because it offers excellent stability, less splatter, and higher penetration to the welding operation. Primarily, Argon comes as a mixture of Carbon Dioxide gas. It’s because it gives superior welding results using CO2 gas.

A mixture of 75%-95% argon and 2 to 25% CO2 is the best choice for MIG welding operations. But sometimes, you may have to use 100% pure argon gas against some metals like; Titanium, Aluminum, and Magnesium.

Argon gas is highly effective for butt and fillet welding because it offers a narrower penetration welding profile. 

  • The best option for Non-ferrous Metals.
  • More Versatile Usage
  • Energy Efficient Gas
  • Equally effective even working in High-Temperature Welding
  • Not Suitable for Welding Steel Joints

Carbon Dioxide (CO2)

The second most used gas in our list for MIG welding is CO2. It is also known as the most reactive gas used in MIG welding. You can use this gas in entirely pure form without having inert or any other gas to operate. This method also provides a price-efficient process because of the least expensive it is. 

Pure carbon dioxide provides deeper penetration, providing more helpful and effective welding operations. You can add other gases with CO2, but it has more spatters and less steady arc operation. 

So, keep in mind to use this gas with care and precise expertise.

  • Can Provides Deeper Penetration Operation.
  • Offers Less Spatters
  • Cost-Efficient Welding Gas
  • Efficient against Thick Metals Welding’s
  • Cannot Use Against Thin Metal Welding’s
  • Cannot Use With Mixing Any Other Gases

Oxygen (O2)

Oxygen is also known as one of the prevalent MIG welding gas used in the industry. It participates as a reactive gas, used mainly infractions or Ratios. Especially, a ratio of 9% or less is best for providing a smooth arc operation. Moreover, this ratio improves welding fluidity, penetration, and smooth arc operation against mild carbon, low alloy, and stainless steel welding.

The only drawback is it provides corrosion, so don’t use it against Magnesium, Aluminum, Copper, or any other Exotic Metals.

To improve the weld quality, you can use some fractions of argon gas from 1 to 5%. Primarily, this mixture is used for Stainless-Steel welding. It gives a steadier arc operation and effective welding results.

  • Economic Welding Operation
  • Comes Within a Steady Means
  • Natural Gas Providing more convenience
  • Generally, the flame temperature of natural gas is low
  • Provides slower cutting speed


Helium is nothing different from Argon gas. It’s another inert gas used popularly for MIG welding operations. 

This MIG welding gas is not for every kind of welding operation. You can use it for Non-Ferrous metals and stainless steel welding only. 

See also:

These inert gases are used mainly by mixing them with another gas. Primarily, It’s due to the high-cost value of the inert gas. Inert gases have nothing to do with chemical reactions, and they offer less spatter. 

A 25 and 75% Helium ratio, 75 and 25% of Argon is ideal for welding needs. You can use this gas for welding thick metals easily. Also, it provides a deeper penetration operation so you can feel the ease of operations while welding.

  • Best Option for Non-Ferrous Metals
  • Ideal for welding Thick Metals
  • You can use it for High-Temperature Welding
  • Not for Common Welding Projects
  • It May Feel Expensive


Finally, we have gathered all the valuable information for you to pick your best MIG welding gas.  In most cases, a mixture of 25% CO2 and 75% of Argon is considered ideal. You can also have a combination of 80%/20% providing more compatible and versatile operation.

But if you are looking for a more budget-friendly option and can hold up against some spatters, you can use CO2 as a mixer with your MIG welding gas. So, keep in mind all the key factors and choose your best option.

If you have any queries, please leave them below.

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