Composition
          WT10 WT20 WT30 WT40
          Color  Yellow Red Purple Orange
         Remainder
 
It´s the most commonly used electrodes today and preferred for their longevity and ease of use. 2% thoriated tungsten electrodes (AWS classification EWTh-2) contain a minimum of 97.30% tungsten and 1.70 - 2.20% thorium. With easy arc starting, arc stability, long electrode life, better anti-pollution features. And they are exceptional for DC electrode negative or straight polarity on carbon and stainless steel, nickel and titanium applications.
Thorium is radioactive; therefore, you must always follow manufacture´s warnings, instructions and the MSDS (Material Safety Data Sheet) for its use.
 
 
Model
Composition
Color
Oxide addition
Contents %
Impurites %
Tungsten %
WT10
ThO2
0.80-1.20
≤0.02
Remainder
Yellow
WT20
ThO2
1.70-2.20
≤0.02
Remainder
 Red
WT30
ThO2
2.80-3.20
≤0.02
Remainder
Purple
WT40
ThO2
3.80-4.20
≤0.02
Remainder
Orange