Weldclass WeldForce WF-140ST, Operating Instructions Manual

Page: 31 / 52

WF-140
ST
/ WF-180
ST
© Weldclass | E.&O.E. | Edition 1.1 | 2019.05.03 31
11.8.2 Fillet Welds
These are welds of approximately triangular cross-section made by depositing metal in the corner of
two faces meeting at right angles. Refer Figure 27 and Figure 28.
A piece of angle iron is a suitable specimen with which to begin, or two lengths of strip steel may be
tacked together at right angles. Using a 3.2mm Weldclass 12V Stick electrode at 100 amps, position
angle iron with one leg horizontal and the other vertical. This is known as a horizontal-vertical (HV) fillet.
Strike the arc and immediately bring the electrode to a position perpendicular to the line of the fillet
and about 45º from the vertical. Some electrodes require being sloped about 20º away from the
perpendicular position to prevent slag from running ahead of the weld. Refer to Figure 27.
Do not attempt to build up much larger than 6.4mm width with a 3.2mm electrode, otherwise the weld
metal tends to sag towards the base, and undercut forms on the vertical leg. Multi-runs can be made as
shown in Figure below. Weaving in HV fillet welds is undesirable.
Figure 27
Figure 28