What Gas Is Used In Tig Welding?

Are you familiar with TIG welding? It is one of the most popular welding methods and is used in the manufacturing of metals, aerospace projects, and so much more. As the technology continues to evolve, more and more people are asking the question- what gas is used in TIG welding?

In 2017, the North American TIG welding market was estimated to be worth $5 billion, with an expected growth of over

6% from 2018-202 With the staggering amount of TIG welding being done, it is vitally important to understand the type of gas used with the process. What is the best option for TIG welding, and why?

Let’s dive into this topic to see what we can discover.

What Gas is Used in TIG Welding?

TIG welding (Tungsten Inert Gas welding) is a form of welding often used by professional welders.

It is a specialized process involving the use of a non-consumable tungsten electrode that is used to produce the weld. The weld is secured in place by the welding gas, shielding the molten weld pool and protecting it from the environment. The gas used in TIG welding can be either an inert gas, such as argon or helium, or a combination of gases known as an active gas, such as CO

In this article, we will explore what gases are used in TIG welding, why they are used, and the various benefits of each.

Why Is Gas Used in TIG Welding?

Inert gases such as argon or helium are used in TIG welding because they provide a shielding effect on the molten weld pool.

This shielding prevents the weld from becoming contaminated with oxygen and nitrogen, as both of these gases are detrimental to a quality weld. The shielding effect of the gas also helps promote a stronger weld and prevents spatter.

What Gas is Used in TIG Welding?

The type of gas used in TIG welding depends on the application and the specific requirements of the weld. Helium is the most common gas used, as it is an ideal shielding gas and has a higher thermal conductivity which helps transfer heat to the molten weld pool.

Argon is a common choice as well, as it produces a stronger and higher-quality weld due to its lower thermal conductivity, which helps to generate a smaller weld pool that is more resistant to defects. Combination gases, such as CO2, can also be used for TIG welding.

These gases are used when welding thicker materials or when greater penetration is needed. They provide better protection from the environment and produce higher welding speeds than inert gases. However, they also generate more spatter and produce a rougher weld surface.

Benefits of Different Gases for TIG Welding

The choice of gas for TIG welding will depend on the application, but there are various pros and cons associated with each type of gas. Helium is a good choice when welding thin materials that require a strong weld, and is the most commonly used shielding gas. Argon is also a popular choice due to its greater puddle control and higher quality welds. CO2 produces higher welding speeds and delivers greater penetration, but it can also create more spatter and a rougher weld surface.


To summarize, the gas used in TIG welding can range from an inert gas such as argon or helium, to combination gases such as CO The choice of gas will depend on the material being welded and the specific requirements of the weld. The inert gases provide better shielding from the environment and promote higher-quality welds, while combination gases offer higher welding speeds and greater penetration. Each gas has its own pros and cons, so it is important to research the best option for each application. Citations:https://www. arc-zone. com/blogs/tig-welding/pros-and-cons-of-tig-welding-shielding-gaseshttps://www. millerwelds. com/resources/article-library/tig-welding-gas-selection-guidancehttps://www. lincolnelectric. com/en-us/support/knowledge-base/pages/tig_shielded_gas_types. aspx

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