There
is not anyway to tell a welder which tungsten is best for his
application. Welders use different power supplies with different
types of arc starters. Each welding application uses different
gases and electrode tip configurations. Also, the material
being welded will vary.
Other factors such as weld speed, pulsing, number of arc starts
and how the tungsten is sharpened will affect tungsten life.
It is recommended that you test the tungsten before putting
it into production.
Ask us for a free sample tungsten electrode to conduct your
own test.
All tungsten electrodes packaged in boxes
of 10 pieces in 7" lengths.
For special diameters & lengths contact sales: 615-793-7020
for price and delivery.
Tungsten
Electrode – Typical
Current Ranges Table
Tungsten
electrodes are classified on the basis of their chemical
compositions:
E
stands
for electrode, which is used for one terminal of the arc
welding circuit
W
stands
for the chemical symbol of tungsten
The
final letters indicate the alloying element (oxide additions):
P
designates
a pure tungsten electrode without alloying elements
Zr
is for zirconiated
Th
is for thoriated
Ce
is for ceriated
La
is for lanthanated
The
numbers specify the nominal alloying composition (in
weight-percent).
Thus, EWTh-2 is a thoriated tungsten electrode containing nominally 2
wt-% thoria.
Approximate
Current Ranges for Tungsten Electrodes for
GTAW
Straight
Reverse
Electrode
Diameter
(inches)
Polarity
Direct
Current
Amps
Polarity
Direct
Current
Amps
Unbalanced
Wave
AC
Unbalanced
Wave
AC
Balanced
Wave
AC
Balanced
Wave
AC
EWP
EWP
EWP
EWCe-2
EWP
EWCe-2
EWCe-2
EWCe-2
EWLa-1
EWLa-1
EWLa-1
EWLa-1
EWTh-1
EWTh-1
EWTh-1
EWTh-1
EWTh-2
EWTh-2
EWTh-2
EWTh-2
EWZr-1
EWZr-1
0.010
Up to 15
N/A
Up to 15
Up to 15
Up to 15
Up to 15
0.020
5-20
N/A
5-15
5-20
10-20
5-20
0.040
15-80
N/A
10-60
15-80
20-30
20-60
0.060
70-150
10-20
50-100
70-150
30-80
60-120
0.093
150-250
15-30
100-160
140-235
60-130
100-180
0.125
250-400
25-40
150-210
225-325
100-180
160-250
0.156
400-500
40-55
200-275
300-400
160-240
200-320
0.187
500-750
55-80
250-350
400-500
190-300
290-390
0.250
750-1000
80-125
325-450
500-630
250-400
340-325
Process Welding Systems, Inc.
Process
Welding Systems, Inc. • 72 Buchanan
St • LaVergne, TN 37086 • Ph:
615-793-7020 • Fx:
615-793-7557
