ESAB ET 186i AC/DC
Manual 0-5425
4-5 BASIC WELDING GUIDE
Art # A-07698
Figure 4-12: Weld Build up Sequence
Heavy plate will require several runs to complete the joint. After completing the first run, chip the slag out and clean the weld
with a wire brush. It is important to do this to prevent slag being trapped by the second run. Subsequent runs are then deposited
using either a weave technique or single beads laid down in the sequence shown in Figure 4-12. The width of weave should not
be more than three times the core wire diameter of the electrode. When the joint is completely filled, the back is either machined,
ground or gouged out to remove slag which may be trapped in the root, and to prepare a suitable joint for depositing the backing
run. If a backing bar is used, it is not usually necessary to remove this, since it serves a similar purpose to the backing run in
securing proper fusion at the root of the weld.
B. 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 to Figure 4-4.
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. This is known as a horizontal-vertical (HV) fillet. Strike the arc and immediately bring the electrode to a position perpen-
dicular to the line of the fillet and about 45º from the vertical. Some electrodes require to be sloped about 20º away from the
perpendicular position to prevent slag from running ahead of the weld. Refer to Figure 4-13. Do not attempt to build up much
larger than 1/4" (6.4mm) width with a 1/8" (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 4-14. Weaving in HV fillet welds is undesirable.
Art # A-07699_AB
45° from
vertical
60° - 70° from line
of weld
Figure 4-13: Electrode Position for HV Fillet Weld
Art # A-07700_AB
1
2
3
4
5
6
Figure 4-`14: Multi-runs in HV Fillet Weld
