What is Heliarc Welding and How Does it Work? Advantages & Uses

Updated: 4 Mar 2024


Heliarc welding is the same as TIG welding, but when it’s in its initial stage, instead of argon gas, it uses helium as a shielding gas, which is why it gets its name of Heliarc welding.

The Heliarc is a precise welding technique that controls the whole welding process and gives you perfect welds. The process happens by electrode in the presence of 100% pure helium gas and creates some of the strongest welds.

It is used in almost every possible industry, such as automotive and aerospace, because of its precision and effective welds. After understanding its process, you can use it with almost everything. We have defined the Heliarc welding process in detail in the article below, so let’s get to it.

What is Heliarc Welding? Let’s Explain in Detail:

Heliarc welding is also known as Gas Tungsten arc Welding (GTAW) because it is an early stage of TIG welding. In the beginning, it was Heliarc welding, which was later called TIG welding, which is what most of the new welders need to learn about.

At first, welds were made with only helium gas, but later, it was replaced by argon, and its name was also changed to TIG welding. The process is simple and similar to TIG welding, but let me explain how it works.

What is Heliarc Welding, uses, applications and advantages
What is Heliarc Welding, Uses, Applications and Advantages
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How Does Heliarc Welding Work:

The principle behind Heliarc welding revolves around making a controlled electric arc between the workpiece and the tungsten electrode. This process usually happens in the presence of argon gas, which safeguards the welding pool from environmental contamination.

The process happens in the presence of inert gas, ordinarily argon, but in this process, it uses helium, which safeguards the welding region from atmospheric contamination. The tungsten electrode, at that point at a high melting point, guarantees a steady arc called a Heliarc torch. The welder has exact command over the welding system.

Heliarc Welding For Carbon Steel Pipe
Heliarc Welding For Carbon Steel Pipe
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As the arc is created, the welder controls the length of the arc and will also present a filler material if necessary. This controlled and exact technique delivers perfect and obvious welds, making Heliarc welding reasonable for applications requiring top-notch and exact welds, like in aviation, automotive, etc.

Advantages of Heliarc Welding:

Like TIG welding, the Heliarc welding technique also has a list of advantages, which are defined below.

Accuracy and Cleanness:

One of the essential benefits of Heliarc welding is its accuracy. The controlled arc and the non-consumable electrode consider careful command over the weld pool, bringing about cleanness and accuracy to the welds. This degree of accuracy is important, especially in businesses where the weld quality is non-negotiable.


Heliarc welding succeeds in working with special compounds and different metal alloys. Its capacity to give exact intensity control makes it reasonable for welding materials that might be sensitive to temperature variation. Working with unique materials, frequently go to Heliarc welding for its adaptability in handling such alloys.


The application of Heliarc welding will be found in various industries and enterprises, including aviation, automotive, and the manufacturing of different machinery parts. Its flexibility to various materials, thicknesses, and uniqueness make the welds adaptable to different projects with multiple welding prerequisites. Also check the below video to get more info about Heliarc technique.

Uses of Heliarc Welding:

Heliarc welding, also known as TIG welding (GTAW), is one versatile and flexible process with different uses across various industries.

Aviation Applications:

Heliarc welding is broadly utilized in the aerospace industry and recommended for welding its basic parts. The accuracy and cleanness of Heliarc welds are necessary for laying some of the satisfying tough welds in the aviation process. It is also used in space shuttles and space programs because of its efficiency.

Automotive Industry:

In the auto business, Heliarc welding is used to make car bodies, frames, exhaust systems, and other parts. The capacity to create perfect and exact welds adds to any vehicle’s general style and basic structural integrity.

General Construction:

This welding technique is utilized not only for huge-scale development but also for specific and small projects where the nature of welds is required. This might incorporate the welding of engineering components and hardened steel structures.

Artistic Fabrication:

Heliarc welding is considered best for any artistic work, whether imaginative or working with custom manufacturing projects. Stone workers and artisans use it to make perplexing metalwork and models because of its capacity to give fine command over the welding system.

Electronic Industry:

In the hardware business, where accuracy and tidiness are essential, Heliarc welding might be applied for joining little parts of the electronic stuff. The controlled circular segment and insignificant intensity input make it reasonable for sensitive electronic access.

Oil and Gas Industry:

Heliarc welding might find applications in the oil and gas industry for welding parts that require high accuracy and erosion obstruction. It is utilized in the creation of specific hardware and pipelines.


Why is it called Heliarc welding?

Heliarc welding is a type of welding. It’s the same as TIG welding but in the early stage. It is called Heliarc because it uses helium as a shielding gas instead of argon.

When was Heliarc invented?

It was invented in 1941 by Meredith, who named it Heliarc welding. It was basically invented only for aviation.


All in all, the Heliarc welding technique remains a flexible and fundamental welding process with applications spreading over a huge number of industries and projects. Its accuracy, neatness, and flexibility to different materials are why people recommended it and decided on its fundamental weld.

I hope you understand the topic; for more info on welding, you should check out the main website.

Abu Bakar

Abu Bakar

Hello, Abu Bakar here, the Mastermind Behind Welding Villa. Test my years of experience through my well-written blogs, where I have covered the overall experience of welding materials and shown all the aspects of Welding, their types and equipment.

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