voestalpine Bohler Welding URANOS NX 2200 SMC Classic Mode D'emploi page 39

Choosing and preparing the electrode
You are advised to use thorium tungsten electrodes (2% thorium-red coloured) or alternatively cerium or lanthanum electrodes
with the following diameters:
(DC-)
3-20 A
15-80 A
70-150 A
150-250 A
250-400 A
400-500 A
500-750 A
750-1100 A
The electrode must be sharpened as shown in the figure.
Filler metal
The filler rods must have mechanical characteristics comparable to those of the parent metal.
Do not use strips obtained from the parent metal, since they may contain working impurities that can negatively affect the
quality of the welds.
Shielding gas
Typically, pure argon (99.99%) is used.
(DC-)
3-20 A
15-80 A
70-150 A
150-250 A
250-400 A
400-500 A
500-750 A
750-1100 A
Current range
(DC+)
-
-
10-20 A
15-30 A
25-40 A 100-180 A
40-55 A 160-240 A
55-80 A 190-300 A
80-125 A 325-450 A
Current range
(DC+)
-
-
10-20 A
15-30 A
25-40 A 100-180 A
40-55 A 160-240 A
55-80 A 190-300 A
80-125 A 325-450 A
(AC)
3-20 A 0,5 mm
20-30 A 1,0 mm
30-80 A 1,6 mm
60-130 A 2,4 mm
3,2 mm
4,0 mm
4,8 mm
6,4 mm
(AC) Nozzle
3-20 A n° 4
20-30 A n° 5
30-80 A n° 6
60-130 A n° 7
n° 8
n° 8
n° 10
n° 12
39
OPERATING INSTRUCTIONS
Electrode
Ø
30°
30-60°
60-90°
90-120°
120-150°
150-180°
150-180°
150-180°
Gas
Flow
5-6 l/min
6-8 l/min
7-10 l/min
8-12 l/min
10-14 l/min
12-16 l/min
15-20 l/min
20-25 l/min
EN