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SECTION 5
TUNGSTEN ELECTRODE
mod2.1
1/94
NOTE ~
Wear clean
gloves
to
prevent
contamination of
tungsten
electrode.
5-1.
Selecting Tungsten
Electrode
Table 5-1.
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
.020
.040
1/16
3/3~
1/8
5/32
3/16
1/4
Uptol5
.
5-20
15-80
70-150
125-225
225-360
360-450
450-720
720-950
*
*
10-20
15-30
25-40
40-55
55-80
80-1 25
Uptol5
5-20
10-60
50-100
100-160
150-210
200-275
250-350
325-450
UptolO
10-20
20-30
30-80
60-130
100-180
160-240
190-300
250-400
2% Thorium
Alloyed
Tungsten (Red Band)
.010
.020
.040
1/16
3/32
1/8
5/32
3/16
1/4
Up
to
25
15-40
25-85
50-160
135-235
250-400
400-500
500-750
750-1000
.
*
10-20
15-30
25-40
40-55
55-80
80-125
Up
to 20
15-35
20-80
50-150
130-250
225-360
300-450
400-500
600-800
Up
to
15
5-20
20-60
60-120
100-180
160-250
200-320
290-390
340-525
Zirconium
Alloyed
Tungsten (Brown Band)
.010
.020
.040
1/16
3/32
1/8
5/32
3/16
1/4
*
*
*
*
*
*
*
*
*
*
Up
to 20
15-35
20-80
50-150
130-250
225-360
300-450
400-550
600-800
Up
to 15
5-20
20-60
60-120
100-180
160-250
200-320
290-390
340-525
Typical
argon
shielding
gas flow rates
are
15
to
35 cf h
(cubic
feet per
hour).
Not
Recommended.
The
figures
listed
are
intended
as a
guide
and
are a
composite
of recommendations from American
Welding Society (AWS)
and electrode
manufacturers.
s-coos
OM-171 108
Page
6
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