Electrode Included Angle/Taper - DC Welding
Tungsten electrodes for DC welding should be
ground longitudinally and concentrically with
diamond wheels to a specific included angle in
conjunction with the tip/flat preparation.
Different angles produce different arc shapes
and offer different weld penetration capabilities.
In general, blunter electrodes that have a larger
included angle provide the following benefits
:
• Last Longer
• Have better weld penetration
• Have a narrower arc shape
• Can handle more amperage without eroding.
Sharper electrodes with smaller included
angle
provide:
• Offer less arc weld
• Have a wider arc
• Have a more consistent arc
The included angle determines weld bead
shape and size. Generally, as the included
angle increases, penetration increases and
bead width decreases.
Tungsten
Diameter
Diameter at the
Tip -
mm
Constant Included
Angle -
Degrees
Current Range
Amps
Current Range
Pulsed Amps
1.0mm
.250
20
05 - 30
05 - 60
1.6mm
.500
25
08 - 50
05 - 100
1.6mm
.800
30
10 - 70
10 - 140
2.4mm
.800
35
12 - 90
12 - 180
2.4mm
1.100
45
15 - 150
15 - 250
3.2mm
1.100
60
20 - 200
20 - 300
3.2mm
1.500
90
25 - 250
25 - 350
40
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