MIG Welding vs CO2 Welding – What’s the Difference

MIG Welding vs CO2 Welding

Welding is the process of joining two metals together using heat. It’s an important process in many industries, including construction, automotive, and manufacturing. There are many different types of welding, but two of the most popular are MIG welding and CO2 welding. If you’re new to welding, you may wonder what the differences are between these two methods. In this blog post, we’ll review the main differences between MIG and CO2 welding so you can determine which is best for your welding needs.

What is MIG Welding?

MIG welding, also known as Gas Metal Arc Welding (GMAW), is a welding process that uses a wire electrode and gas to create an arc. The wire is fed through a welding gun and melts as it comes into contact with the metal being welded. The gas is used to shield the weld from the atmosphere to prevent any contamination. This method of welding is typically used on thin to medium-thickness metal.

What is CO2 Welding?

CO2 welding, also known as Gas Shielded Flux Cored Arc Welding (FCAW), is a welding process that uses a wire electrode and a shielding carbon dioxide gas. This process creates a cleaning action that removes impurities from the weld, resulting in a strong and clean weld. CO2 welding is typically used on thicker metals.

Difference Between MIG Welding and CO2 Welding

Difference in Equipment

The equipment used in MIG welding and CO2 welding is slightly different. MIG welding requires a tank of shielding gas, a wire feeder, and a welding gun. CO2 welding, on the other hand, requires a flux-cored wire instead of a solid wire and a larger shielding gas tank that contains a mixture of carbon dioxide and other gases.

Difference in Welding Speed

MIG welding is faster than CO2 welding. The wire feeds through the gun rapidly, allowing for a constant and smooth weld. CO2 welding is slower because of the nature of the process. The welder has to stop periodically to change the electrode wire, resulting in a slower overall process.

Difference in Welding Quality

MIG and CO2 welding can produce high-quality welds, but CO2 welding is often preferred for its clean and strong welds. MIG welding can also produce a high-quality weld, but it’s more susceptible to contamination from the atmosphere. This makes it less desirable for certain applications.


In conclusion, both MIG and CO2 welding have advantages and disadvantages. MIG welding is great for thinner and faster welding, while CO2 welding is ideal for thicker metals and produces cleaner, stronger welds. It’s important to consider your welding needs before choosing which method to use. Hopefully, this blog post has given you a clear understanding of the differences between MIG and CO2 welding so you can make an informed decision.

Minal Jogale

Minal Jogale

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