OTC DTX-3000 AC/DC - Welding Parameters

Operation
22
DTX-2200-3000 AC/DC
14.2.2 Welding Parameters
Table 4 shows some general indications for the choice of electrode, based on the thickness of the parts to be
welded. The values of current to use are shown in table 5 with the respective electrodes for the welding of
common steels and low-grade alloys. These data have no absolute value and are indicative data only. For a
precise choice follow the instructions provided by the electrode manufacturer.
Table 4
WELDING THICKNESS
(mm) Ø ELECTRODE (mm)
1,5 - 3
3 - 5
5 - 12
≥ 12
2
2,5
3,2
4
Table 5
Ø ELECTRODE
(mm) CURRENT (A)
1,6
2
2,5
3,2
4
5
30 - 60
40 - 75
60 - 110
95 - 140
140 - 190
190 - 240
The current to be used depends on the welding positions and the type of joint, and it increases
according to the thickness and dimensions of the part.
The current intensity to be used for the different types of welding, within the field of regulation shown in
table 5 is:
• High for plane, frontal plane and vertical upwards welding.
• Medium for overhead welding.
• Low for vertical downwards welding and for joining small preheated pieces.
A fairly approximate indication of the average current to use in the welding of electrodes for ordinary steel is
given by the following formula:
I = 50 × (Øe - 1)
Where:
I = intensity of the welding current
Øe = electrode diameter
Example:
For electrode diameter 4 mm
Beispiel: Elektrodendurchmesser 4 mm
I = 50 × (4 - 1) = 50 × 3 = 150A