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MIG welding requires specific gases to create a protective atmosphere during the welding process. MIG welding gases encompass a range of options, each serving different purposes and applications.

MIG gases include:

  1. Argon: Used for welding non-ferrous metals such as aluminium and stainless steel
  2. CO2: A cost-effective MIG welding gas that is often used for general-purpose welding of carbon steel
  3. Argon/CO2 Mixes: These blends offer a balance between the benefits of argon and CO2.

Contrastingly, the primary gas used for TIG welding is Argon due to its unique properties. It provides excellent inertness, shielding the weld area from atmospheric contaminants while ensuring a stable and controlled welding environment. Argon welding gas enables high-quality welds with minimal oxidation, making it ideal for welding various metals.

Shop our comprehensive range of high-quality, rent-free MIG Welding gas bottles and TIG welding gas cylinders to suit a vast range of requirements.


What type of gas do I need for MIG and TIG welding?

MIG welding typically uses a shielding gas, most commonly inert gases like Argon (Ar) or Helium (He), or mixtures of the two. The specific gas or mix depends on the material being welded.
TIG welding can use inert gas for shielding, similar to MIG, but it can also weld with no shielding gas for certain materials like stainless steel. In some cases, a reactive gas like oxygen or nitrogen is added to the shielding gas for specific effects on the weld.

What’s the difference between Argon and Helium in MIG welding?

Argon is more affordable and provides good weld penetration for most steels.  Helium offers a hotter arc, leading to faster travel speeds and deeper penetration. However, it’s more expensive and less forgiving for beginners due to its thinner weld pool.

What safety precautions should I follow when using TIG welding gas and MIG welding gas bottles?

Prioritising safety when handling welding gas bottles is essential to ensure a safe and worry-free usage experience. Safety is a priority at EWS so any safety information will always be attached to our gas bottle products. Please familiarise yourself with our Argon Safety Data Sheet, Carbon Dioxide Safety Data Sheet, Argon CO2 Mix Safety Data Sheet, which will give you all the safety information you will need to make the most of your gas bottle safely.

Can I use argon welding gas for other welding processes besides TIG welding?

While argon is primarily used in TIG welding due to its inert properties, it can also be utilized in other welding processes. Argon is often used as a shielding gas in Metal Inert Gas (MIG) welding for specific applications. It is commonly mixed with other gases like carbon dioxide to create custom blends for various welding tasks.

How do I choose the right shielding gas for my project?

The ideal gas or mixture depends on the material you’re welding, the desired weld properties (penetration, bead shape), and machine settings.  Contact one of our welding gas experts and we will help you choose the right gas.

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