Tungsten inert gas (TIG) welding, or gas tungsten arc welding, is commonly used in projects involving steel, aluminum, or joining two different types of metal together. Like MIG welding, TIG uses an electrical arc to create heat and a wire filler material to create neat, strong joints. The weld site itself is protected by an inert gas, which is crucial for durable, long-lasting welds.

The Gases Used in TIG Welding

Why Gas Is So Important in Welding

The inert or semi-inert gases used in TIG welding are heavier than air, so they pool around the weld site and protect it from atmospheric contamination. Without it, oxygen and nitrogen in the air would cause rapid corrosion, unpredictable heat output, and generally weaken the quality of your welds. While MIG welders can employ a variety of gases and mixtures, depending on the project, TIG welding requires specific protective materials.

Pure Argon Gas

As a relatively inexpensive, totally inert gas that can be used in almost any application, argon is the most popular choice for TIG welding. Argon generally creates a narrow, concentrated, stable arc, resulting in shiny, precise welds that don’t require much cleaning.

Argon/Helium Mix

A 50/50 mix of argon and helium provides better heat conduction, allowing you to increase the temperature of the weld. This makes the blend ideal for high-heat applications, although it does increase the chances of burning through the material.

Helium & Hydrogen

Welding stainless steel or especially thick aluminum requires a hotter arc, so TIG welders might use helium or hydrogen instead of argon. This gas allows welders to create a wider, hotter bead that penetrates more deeply into the metal, making sturdy joints that wouldn’t be possible with other gases.

Since 1959, Wayne Oxygen & Welding Supply has provided the best TIG welding supplies to professionals and hobbyists throughout the Waynesboro, VA, region. They only offer products from respected brands, like Lincoln Electric Company® and Miller Electric Manufacturing®, and the expertise to help you choose the perfect material for your job. Visit their website to browse their selection of compressed gases. To contact their Waynesboro location, call (540) 942-4145, dial (434) 295-2334 to reach their Charlottesville office, or call (540) 434-1235 to speak to a friendly representative in Harrisonburg.