ESAB Firepower MST-200 User Manual

6 BASIC WELDING GUIDE
0463 815 001 - 64 - © ESAB AB 2021
Guide for selecting filler wire diameter
Table 16: Filler wire selection guide
Electrode diameter
DC current range
1/16 in. (1.6 mm)
20-90 A
3/32 in. (2.4 mm)
65-115 A
1/8 in. (3.2 mm)
100-165 A
3/16 in. (5 mm)
200-350 A
Tungsten electrode types Table 17:
Electrode type
(ground finish)
Welding
application
Features
Color code
Thoriated 2%
DC welding of mild
steel, stainless
steel and copper.
Excellent arc
starting, Long life,
High current
carrying capacity.
Red
Zirconated 1%
High quality AC
welding of
aluminum,
magnesium and
their alloys.
Self cleaning,
Long life,
Maintains balled
end, High current
carrying capacity.
White
Ceriated 2%
AC and DC
welding of
mild steel,
stainless steel,
copper, aluminum,
magnesium and
their alloys.
Longer life, More
stable arc, Easier
starting, Wider
current range,
Narrower more
concentrated arc.
Grey
NOTE!
The Firepower MST-200 inverter is not suited for AC TIG welding.
TIG Welding filler rods
Base metal
thickness
DC current
for mild steel
DC current
for stainless
steel
Tungsten
electrode
diameter
Filler rod
diameter (if
required)
Argon gas
flow rate
CFH
Joint type
0.040 in.
1.0 mm
35-45
40-50
20-30
25-35
0.040 in.
1.0 mm
1/16 in.
1.6 mm
10-15
Butt/Corner
Lap/Fillet
0.045 in.
1.2 mm
45-55
50-60
30-45
35-50
0.040 in.
1.0 mm
1/16 in.
1.6 mm
10-15
Butt/Corner
Lap/Fillet
1/16 in.
1.6 mm
60-70
70-90
40-60
50-70
0.040 in.
1.0 mm
1/16 in.
1.6 mm
15
Butt/Corner
Lap/Fillet
1/8 in.
3.2 mm
80-100
90-115
65-85
90-110
0.040 in.
1.0 mm
3/32 in.
2.4 mm
15
Butt/Corner
Lap/Fillet
3/16 in.
4.8 mm
115-135
140-165
100-125
125-150
0.040 in.
1.0 mm
1/8 in.
3.2 mm
20
Butt/Corner
Lap/Fillet
1/4 in.
6.4 mm
160-175
170-200
135-160
160-180
0.040 in.
1.0 mm
5/32 in.
4.0 mm
20
Butt/Corner
Lap/Fillet

ESAB Firepower MST-200 Specifications

General

Brand	ESAB
Model	Firepower MST-200
Category	Welding System
Language	English