Lincoln Electric Stick Electrode Welding C2.410 - Manual (Page 25)

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Drag the electrode lightly. Since low hydrogen electrodes rely on
the molten slag for shielding, never hold a long arc, whip, leave
the crater, or move rapidly in any direction. Failure to follow
these techniques may result in porosity and/or reduce mechani-
cal properties.
For Clean Tie-Ins – Strike the arc ahead of the crater, move
quickly back into the crater, then proceed in the direction of
welding. This technique welds over the striking area, eliminating
porosity or tendency for poor starting bead shape.
Multiple Pass Welds – Clean the slag after each bead. When
welding in the downhand position, use stringer beads or small
weaves rather than wide weaves to avoid slag inclusions.
Vertical Techniques
Use 5/32” or smaller electrodes and currents in the lower portion
of the electrode’s range. Techniques are as follows:
1. Use a triangular weave for heavy single pass welds.
Heavy Single Pass
Multipass
Straight weave
Stringer bead
Triangular weave