BOC Smootharc Multi 180 - Tungsten Electrodes; Tungsten Electrode Types and Performance

Tungsten electrodes
Base metal type
Thickness
range Desired results
Welding
current Electrode type Shielding gas Tungsten performance characteristics
Copper alloys,
Cu-NI alloys and
Nickelalloys
All General purpose DCSP 2% Thoriated
(EW-Th2)
75% Argon/
25% Helium
Best stability at medium currents. Good arc
starts
Medium tendency to spit
Medium erosion rate
2% Ceriated
(EW-Ce2)
75% Argon/
25% Helium
Low erosion rate. Wide current range. AC or DC.
No spitting. Consistent arc starts
Good stability
Only thick
sections
Increase
penetration or
travel speed
DCSP 2% Ceriated
(EW-Ce2)
75% Argon/
25% Helium
Low erosion rate. Wide current range. AC or DC.
No spitting. Consistent arc starts
Good stability
Mild Steels,
Carbon Steels,
Alloy Steels,
StainlessSteels
and Titanium
alloys
All General purpose DCSP 2% Thoriated
(EW-Th2)
75% Argon/
25% Helium
Best stability at medium currents. Good arc
starts
Medium tendency to spit
Medium erosion rate
2% Ceriated
(EW-Ce2)
75% Argon/
25% Helium
Low erosion rate. Wide current range. AC or DC.
No spitting Consistent arc starts
Good stability
2% Lanthanated
(EWG-La2)
75% Argon/
25% Helium
Lowest erosion rate. Widest current range on
DC. No spitting. Best DC arc starts and stability
Only thick
sections
Increase
penetration or
travel speed
DCSP 2% Ceriated
(EW-Ce2)
75% Argon/
25% Helium
Low erosion rate. Wide current range. No
spitting. Consistent arc starts. Good stability
2% Lanthanated
(EWG-La2)
Helium Lowest erosion rate. Highest current range. No
spitting. Best DC arc starts and stability
45BOC Smootharc Multi 180/200 Operating manual