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TIG

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TIG Welding (GTAW)

TIG welding uses a non-consumable tungsten electrode to make a clean and precise arc and weld. The TIG process also uses a shielding gas to protect the weld puddle from the atmosphere. Without using proper shielding gas the weld will become porous and weak.

TIG welding is one of the more difficult processes to manage. The welder will have to manage different equipment in two hands. Your dominant hand will hold the welding torch. While the other hand guides a filler metal onto the welding area. The torch emits shielding gas, and will hold the electrode in an air cooled setup.

TIG and MIG pose similar dangers as UV radiation as fumes emit from the arc. TIG does offer a cleaner work area, there are no molten splatter and sparks flying around while you weld. The small blue arc created with a TIG electrode emits a glow. The arc will Illuminate your work area and any exposed skin. TIG welds tend to be shorter per arc and are usually limited to indoor use.

TIG welding offers the utmost control to the welder. Arc temperature, size and length are key to control. TIG welding can achieve a very small weld or a larger weld. Welding with such precision makes for excellent aerospace products and instrumentation uses.

AWS classification EWTh-2 improves arc starts and allows for higher current carrying capacity AC welding, but are exceptional for DC electrode negative or straight polarity on carbon and stainless steel, nickel and titanium applications.

Warning

The Thorium used in 2 per cent Thoriated tungsten is a radioactive element and therefore can be dangerous to the health of those exposed to it and to the environment.

This occurs primarily during the inhalation of dust caused during grinding of tips for welding, but also to a lesser extent during breathing of any fumes released during welding.

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