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SECTION
7-
TUNGSTEN
ELECTRODE
N
OTE
Foradditionalinformation,
see
yourdistributorfora
handbookon
the
Gas
Tungsten
I
Arc
Welding
(GTAW)
process.
Wear
clean
gloves
to
prevent
contamination
of
tungsten
electrode.
7-1.
Selecting
Tungsten
Electrode
Table
7-1.
Tungsten
Size
Electrode
Diameter
Amperage
Range
-
Gas
Type,
-
Polarity
DC
Argon
Electrode
DC
Argon
Electrode
AC
Argon
UsIng
AC
Argon
Balanced
Negative/Straight
Polarity
Positive/Reverse
Polarity
High
Frequency
Wave
Using
High
Freq.
Pure
Tungsten
(Green
Band)
.010
Up
to
15
*
Up
to
15
lip
to
10
.020
5-20
*
5-20 10-20
.040
15-80
*
10-60
20-30
1/16
70-150
10-20
50-100
30-80
3/32
125-225
15-30
100-160
60-130
1/8
225-360
25-40
150-210
100-180
5/32
360-450
40-55
200-275
160-240
3/16
450-720
55-80
250-350
190-300
1/4
720-950
80-125
325-450
250-400
2%
Thorium
Alloyed
Tungsten
(Red
Band)
.010
Upto25
Upto2O Uptol5
.020
15-40
15-35 5-20
.040
25-85
*
20-80
20-60
1/16
50-160
10-20
50-150 60-120
3/32
135-235
15-30
130-250
100-180
1/8
250-400
25-40
225-360
160-250
5/32
400-500
40-55
300-450
200-320
3/16
500-750
55-80
400-500
290-390
1/4
750-1000
80-125
600-800 340-525
Zirconium
Alloyed
Tungsten
(Brown
Band)
.010
Upto2O
Up
to
15
.020
*
15-35
5-20
.040
* *
20-80
20-60
1/16
*
50-150
60-120
3/32
*
130-250
100-180
1/8
*
*
225-360
160-250
5/32
*
300-450 200-320
3/16
*
400-550
290-390
1/4
600-800
340-525
Typical
argon
shielding
gas
flow
rates
are
15
to
35
cfh
(cubic
feet
per
hour).
Not
Recommended.
The
figures
listed
are
intendi~d
as
a
guide
and
are
a
composite
of
recommendations
from
American
Welding
Society
(AWS)
and
electrode
manufacturers.
S-0009
OM-168
256
Page
20
mod2.1
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