Tungsten Electrodes

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.

Tungsten Electrode – Typical Current Ranges Table:
Tungsten electrodes are classified on the basis of their chemical compositions:
stands for electrode, which is used for one terminal of the arc welding circuit
stands for the chemical symbol of tungsten

The final letters indicate the alloying element (oxide additions):
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 weight-percent thoria.

Ask PWS 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.

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-1

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