MIG Welding vs MAG Welding – What’s the Difference

MIG Welding vs MAG Welding

Welding is crucial in various industries, including manufacturing, automotive, and construction. It is a process of joining two metal pieces to form a single piece or a strong bond. The two most common types of welding are MIG welding and MAG welding. Though the names sound similar, there is a vast difference between them. In this blog, we will explore the difference between the two types and help you choose the right type of welding for your project.

Difference Between MIG Welding and MAG Welding

The Full Form

The primary difference between MIG and MAG welding is their full forms. MIG is an acronym for Metal Inert Gas, while MAG stands for Metal Active Gas. The names differ in the gases used to shield the welding arc.

Gas Used in Shielding the Weld

MIG welding uses inert gases, such as Helium and Argon, to shield the welding arc. These gases are non-reactive and prevent any oxidation of the weld. On the other hand, MAG welding uses active gases such as Carbon Dioxide (CO2) and Oxygen (O2). These gases are reactive and cause metal oxidation during the welding process.

Welds Types

MIG welding is commonly used for thin materials, whereas MAG welding is better suited for thicker metals. MIG welding can produce cleaner and more precise joints, whereas MAG welding can produce deeper penetrating welds.


MIG welding is used in various industries, such as automobile manufacturing, metal fabrication, and general repair. MAG welding is typically used for heavy-duty construction and equipment repairs.


The cost is one of the most significant factors affecting the choice between MIG and MAG welding. MAG welding is generally cheaper than MIG welding since its gases are less expensive. MIG welding, on the other hand, requires an expensive inert gas to prevent any oxidation of the metals.


In summary, MIG and MAG welding have their respective uses and benefits based on different welding requirements. Understanding the differences and their benefits can help you choose the correct type of welding for your project. It is important to clearly understand the welding requirements, material thickness, and cost before choosing a welding method. Whether you choose MIG or MAG welding, quality and safety should be a priority.



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