Electrodes To Be Welded; Tig Dc Welding - Kemppi MasterTig ACDC 3500W Operating Manual

2.6 Electrodes to be welded

With the Mastertig AC/DC power source you can use all
electrodes designed for DC or AC welding within the
current limits of the machine in question.
Mastertig AC/DC 3500W power source is suitable
for carbon arc gouging and cutting according to its
maximum power.
Reference max electrode diameters and yield
electrode type yield
Fe-rutile 95 %
Fe-base 100 %
Fe-high-yield 180 %
250-270 %
Ss-rutile - - -
Ss-base - - -
Ss-high-yield 150 %
Hard facing by 100 %
welding

2.7 TIG DC welding

DC– current is used typically when welding different kind of steel. We rekommend for DC– welding
a WC20 (grey) elctrode.
2.7.1 Sharpening of the electrode
The tip of the electrode is sharpened into a cone, so that the arc becomes steady and the thermal
energy is concentrated on the spot being welded. The length of the sharpening to the diameter of
the electrode:
3500W
ø 6
ø 6
ø 5
ø 5
ø 6
ø 6
with small current sharp l = 3 x d
ø 6
with large current blunt l = 1 x d
ø 6
Choice of the electrode for DC welding. The table is only given as a guide.
Welding current
range
DC-
A
5...80
70...140
140...230
225...350
330...350
© Kemppi Oy 2021
Electrode Gas nozzle Gas flow rate
WC20 Argon
ø mm number ø mm l / min
1.0 4/5 6.5/8.0 5...6
1.6 4/5/6 6.5/8.0/9.5 6...7
2.4 6/7 9.5/11.0 7...8
3.2 7/8 11.0/12.5 8...10
4 10 16 10...12
7
MasterTig ACDC 3500W R01