Current Ranges for Tungsten Electrodes

TIG Welding	Current Ranges for Tungsten Electrodes – (Argon Shielding Gas)
Electrode Diameter (inches)	Dcen, A	Dcep, A	High-Frequency unbalanced ac, A			High-Frequency balanced ac, A
	EWP EWTh-1 EWTh-2 EWTh-3	EWP EWTh-2 EWTh-2 EWTh-3	EWP	EWTh-1 EWTh-2 EWZr	EWTh-3	EWP	EWTh-1 EWTh-2 EWZr	EWTh-3
0.010	up to 15	—	up to 15	up to 15	—	up to 15	up to 15	—
0.020	5-20	—	5-15	5-20	—	10-20	5-20	10-20
0.040	15-80	—	10-60	15-80	10-80	20-30	20-60	20-60
1/16	70-150	10-20	50-100	70-150	50-150	30-80	60-120	30-120
3/32	150-250	15-30	100-160	140-235	100-235	60-130	100-180	60-180
1/8	250-400	25-40	150-210	225-325	150-325	100-180	160-250	100-250
5/32	400-500	40-55	200-275	300-400	200-400	160-240	200-320	160-320
3/16	500-750	55-80	250-350	400-500	250-500	190-300	290-390	190-390
1/4	750-1000	80-125	325-450	500-630	325-630	250-400	340-525	250-525