Firepower MST 180i Operating Manual page 73

Tungsten Electrode Types
Electrode Type
(Ground Finish)
Thoriated 2%
Zirconated 1%
Ceriated 2%
The Firepower MST 180i is not suited for AC TIG welding.
Base Metal DC Current
Thickness
0.040"
1.0mm
0.045"
1.2mm
1/16"
1.6mm
1/8"
3.2mm
3/16"
4.8mm
1/4"
6.4mm
TIG Welding is generally regarded as a specialized process that requires operator competency. While many of the principles
outlined in the previous Arc Welding section are applicable a comprehensive outline of the TIG Welding process is outside
the scope of this Operating Manual. For further information please refer to www.firepower.com or contact Firepower.
Manual 0-5339
Welding Application
DC welding of mild
steel, stainless steel
and copper
High quality AC weld-
ing of aluminum,
magnesium and their
alloys.
AC & DC welding of
mild steel, stainless
steel, copper, alumi-
num, magnesium and
their alloys
DC Current
for Mild for Stainless
Steel Steel
35-45 20-30
40-50 25-35
45-55 30-45
50-60 35-50
60-70 40-60
70-90 50-70
80-100 65-85
90-115 90-110
115-135 100-125
140-165 125-150
160-175 135-160
170-200 160-180
Features
Excellent arc starting,
Long life, High current
carrying capacity
Self cleaning, Long
life, Maintains balled
end, High current car-
rying capacity.
Longer life, More
stable arc, Easier
starting, Wider current
range, Narrower more
concentrated arc.
Table 4-9
NOTE
Tungsten Filler Rod
Electrode Diameter (if
Diameter required)
0.040" 1/16"
1.0mm 1.6mm
0.040" 1/16"
1.0mm 1.6mm
1/16" 1/16"
1.6mm 1.6mm
1/16" 3/32"
1.6mm 2.4mm
3/32" 1/8"
2.4mm 3.2mm
1/8" 5/32"
3.2mm 4.0mm
Table 4-10
4-19
Firepower MST 180i
Color Code
Red
White
Grey
Argon Gas Joint Type
Flow Rate
CFH
10-15 Butt/Corner
Lap/Fillet
10-15 Butt/Corner
Lap/Fillet
15 Butt/Corner
Lap/Fillet
15 Butt/Corner
Lap/Fillet
20 Butt/Corner
Lap/Fillet
20 Butt/Corner
Lap/Fillet
BASIC WELDING GUIDE