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TIG WELDING
Welding Parameters
It is necessary to decide approximate range of welding current needed for the job at hand to select correct electrode, nozzle and gas flow setting. The material thicknesses given in the table below for the different current ranges are indicative. Actual current needed to form a proper molten pool will also partly depend on the size of the workpiece, the type of joint, and the amount of preheating used.
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Material thickness
Steels and Stainless steels
<1.5mm
1.5 - 2.5mm
2.5 - 4mm
>4mm
Material thickness Copper alloys
<1.0mm
1.0-1.5mm
1.5-2.5mm
>2.5mm
Welding current, DC, electrode-
20-70A
50-120A
100-180A
150-250A
Gas flow, pure argon
6 l/min
7 l/min
8 l/min
9 l/min
Electrode point angle
35°
45°
60°
60°
Collet size,
diameter of electrode
1.6mm-1/16”
1.6mm-1/16”
2.4mm-3/32”
2.4mm-3/32”
Collet body, size diameter of opening
1.6mm-1/16”
1.6mm-1/16”
2.4mm-3/32”
2.4mm-3/32”
Nozzle number and diameter of opening
no.6 (9mm)
no.6 (9mm)
no.7 (11mm)
no.7 (11mm)
Tungsten electrode size
1.6mm-1/16”
1.6mm-1/16”
2.4mm-3/32”
2.4mm-3/32”