ESAB SR-B 9 - 4 Operation; General; Connections; Choice of Electrode

4 OPERATION
0463 697 001
- 11 -
© ESAB AB 2021
4 OPERATION
4.1 General
General safety regulations for handling the equipment can be found in the "SAFETY"
chapter of this manual. Read it through before you start using the equipment!
Read the operating instructions for the welding components, e.g. power source and connect
accordingly.
4.2 Connections
Tighten the connections for the torch carefully to avoid overheating the connection,
connection interference, mechanical damage or leakage of liquid or gas.
Connect water connections to the torch so that the red terminal is always connected to the
corresponding red terminal and the blue terminals are always connected to the
corresponding blue terminals.
4.3 Choice of electrode
By alloying the tungsten electrode with 1% to 2% lanthanum or cerium the electron discharge
is increased, which gives better striking and restriking and therefore increased arc stability.
Alloyed tungsten electrodes have a longer service life, tolerate higher currents and are less
likely to leave tungsten residue in the weld.
Pure tungsten electrode (AC) Green WP Used for welding light metal
alloys.
Cerium alloyed tungsten electrode
(AC/DC)
Grey WC20 Used for welding light metals
such as aluminium and
magnesium. Electrode tip must
be rounded when welding.
Lanthanum alloyed tungsten
electrode (DC)
Gold WL15 Usually used for welding
stainless steel, steel, copper,
titanium etc.
Lanthanum alloyed tungsten
electrode (AC/DC)
Black WL10 Used for welding light metal
alloys, stainless steel, steel,
copper, titanium etc.
Selection table
A / AC A / DC
W CeO2 La2O3 CeO2 La2O3
1.0 mm
(0.039in.)
6.4/8.0 mm
(0.252/0.315in.)
10–60 - 15–100 70–80 20–100
1.6 mm
(0.063in.)
6.4/8.0/9.8 mm
(0.252/0.315/0.386in.)
50–100 60–90 70–160 80–140 80–160
2.4 mm
(0.094in.)
9.8/11.2/12.7 mm
(0.386/0.441/0.500in.)
100–160 90–130 110–200 150–210 120–230
3.2 mm
(0.126in.)
11.2/12.7 mm
(0.441/0.500in.)
130–180 140–190 150–205 220–320 200–305
4.0 mm
(0.157in.)
12.7 mm (0.500in.) 180–230 200–250 180–270 330–420 250–420