What Gas Is Used With Mig Welding?

Whether it’s for your own personal use, a hobby, or for a profession, metal fabrication is an integral part of the way we construct things. Welding is an important technology which requires the use of gases to be done efficiently. MIG welding is a very popular method used by professionals across the world.

But what gas is used to make it work? This article will look at the gases used in MIG welding, the types of gas used, as well as its benefits and drawbacks.

With an estimated 860,000 welders in the U. S.

and 3 million welders around the world, having a solid understanding of welding and its uses is crucial. Let’s look into the gases used in MIG welding, and discover why its so popular.

What gas is used with MIG welding?

MIG Welding (Metal Inert Gas) is a popular welding process that is used to join metal parts together by using a consumable wire electrode, a welding power supply and a shielding gas.

The shielding gas is an important part of MIG welding that keeps the molten weld pool from being exposed to oxygen and other contaminates in the atmosphere which could create porosity in the weld.

Types of MIG Welding Gas

The type of gas you use for MIG welding depends on the type of metal you are welding. The three most common gases used for MIG welding are argon, carbon dioxide and a mixture of argon and carbon dioxide.

Argon Gas

Argon is an inert gas that is most commonly used for MIG welding of non-ferrous materials such as aluminum and stainless steel. The argon gas provides a deep penetrating weld that is free of contaminants.

Carbon Dioxide Gas

Carbon dioxide is a relatively inexpensive gas that is often used for MIG welding ferrous metals such as mild steel and high strength steels.

The carbon dioxide gas provides a good penetration weld but can cause some metal oxidation if not used with the correct wire feed speed and welding parameters.

Argon-Carbon Dioxide Mixture

Combining argon and carbon dioxide provides the best of both gases and is suitable for welding a wide range of materials.

The mixture provides a shallow penetration weld similar to carbon dioxide but with much less oxidation.

Choosing the Right Gas for Your Welding Job

The choice of gas will depend on the application, the type of metal being welded and the welding parameters.

In general, argon is best used for welding thin sections of aluminum and stainless steel while carbon dioxide is best used for thicker sections of ferrous metals. The argon-carbon dioxide mixture is best used for a wide range of materials and applications.

Safety Considerations

Whichever gas you choose, it is important to ensure that it is of the correct purity or it could affect the weld quality.

Additionally, the shielding gas should be delivered to the weld in the correct quantity and at the correct pressure in order to ensure a good quality weld.

Conclusion

MIG welding is a popular welding process that is used to join metal parts together by using a consumable wire electrode, a welding power supply and a shielding gas. The three most common gases used for MIG welding are argon, carbon dioxide and a mixture of argon and carbon dioxide. The choice of gas will depend on the application, the type of metal being welded and the welding parameters. It is important to ensure that the shielding gas is of the correct purity and is delivered to the weld in the right quantity and pressure. Citation URL: https://en. wikipedia. org/wiki/Metal_inert_gas_weldinghttps://www. weldingmart. com/blog/gas-used-mig-welding/

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