This is the most widely used electrode. It is extremely long lasting and highly durable and these electrodes are a staple in DC welding applications.
2% Thoriated Tungsten is best for copper alloys, nickel alloys, titanium alloys and non-corroding steels.
Thorium is radioactive; always ensure to follow all warnings, instructions, and the Material Safety Data Sheet (MSDS) for its use.
Colour Code Red
Normally the gas used is argon (Ar). Helium (He) can be added to increase penetration and fluidity of the weld pool.
TIG can be used to weld copper, titanium, even two dissimilar metals, and is handy for making tricky welds, like welding pipe or round items.
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.
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.
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