OPERATION
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Ceriated (Orange)
Ceriated tungsten electrodes (AWS classification EWCe-2) contain a minimum of 97.30
percent tungsten and 1.80 to 2.20 percent cerium and are referred to as 2% ceriated.
Ceriated tungsten performs best in DC welding at low current settings. They have
excellent arc starts at low amperages and become popular in such applications as orbital
tube welding, thin sheet metal work. They are best used to weld carbon steel, stainless
steel, nickel alloys, and titanium, and in some cases it can replace 2% Thoriated
electrodes. Ceriated tungsten is best suited for lower amperages it should last longer than
Thoriated tungsten higher amperage applications are best left to Thoriated or
Lanthanated tungsten.
Lanthanated (Gold)
Lanthanated tungsten electrodes (AWS classification EWLa-1.5) contain a minimum of
97.80 percent tungsten and 1.30 percent to 1.70 percent lanthanum and are known as 1.5%
lanthanated. These electrodes have excellent arc starting, a low burn off rate, good arc
stability, and excellent re-ignition characteristics. Lanthanated tungsten also share the
conductivity characteristics of 2% Thoriated tungsten. Lanthanated tungsten electrodes
are ideal if you want to optimize your welding capabilities. They work well on AC or DC
electrode negative with a pointed end, or they can be balled for use with AC sine wave
power sources. Lanthanated tungsten maintains a sharpened point well, which is an
advantage for welding steel and stainless steel on DC or AC from square wave power
sources.
Zirconiated (White)
Zirconiated tungsten electrodes (AWS classification EWZr-1) contain a minimum of
99.10 percent tungsten and 0.15 to 0.40 percent zirconium oxide. Most commonly used
for AC welding, Zirconiated tungsten produces a very stable arc and is resistant to
tungsten spitting. It is ideal for AC welding because it retains a balled tip and has a high
resistance to contamination. Its current-carrying capacity is equal to or greater than that
of thoriated tungsten. Zirconiated tungsten is not recommended for DC welding.
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