Lincoln Electric Stick Electrode Welding C2.410 - Manual (Page 18)

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High Speed Welding (Sheet Metal)
Welding sheet steel (18 through12 gauge) requires electrodes
that weld at high travel speeds with minimum skips, misses, slag
entrapment, and undercut.
Procedures
Groove welds . . . . . . . . . . . . . . . . . . . . . . . . . page 20
Edge Welds . . . . . . . . . . . . . . . . . . . . . . . . . . page 20
Fillet Welds . . . . . . . . . . . . . . . . . . . . . . . . . . page 21
Lap Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . page 21
Corner Welds . . . . . . . . . . . . . . . . . . . . . . . . . page 22
Burnthrough Spot Welds . . . . . . . . . . . . . . . . page 23
Alternate Electrodes
When the recommended electrodes are not available, or if
preferred, the following electrodes can be substituted using
approximately the same procedures:
Electrode Class Alternate
Fleetweld 5P E6010 E6011
Fleetweld 5P+ E6010 E6011
Fleetweld 35 E6011 E6010
Fleetweld 7 E6012 E6013
Fleetweld 37 E6013 E7014
Welding Techniques
Generally, use the highest current possible that will not burn-
through, undercut, or melt the edges of lap, corner, or edge
welds. Fast welding depends upon the operators skill at
staying on the joint and traveling at a uniform speed. A few
days practice may be needed by good welders when first
starting sheet metal welding.
For maximum welding speed, minimum distortion and flat welds
generally position joints for welding 45° to 75° downhill.
The procedure tables assume tight fit-up and adequate
clamping or tacking for fast travel speeds and minimum
distortion. Use copper backing whenever possible to decrease
burnthrough tendencies. When poor fit-up is encountered:
1. Reduce the current.
2. Increase the drag angle.
3. With E6010 or E6011 electrodes use a quick whip
technique with a slight circular motion in the crater to
bridge the gap.
4. With E6012 or E6013 electrodes, use a small quick
weave technique to bridge the gap.