High Speed Welding (Sheet Metal) - Lincoln Electric Stick Electrode Welding C2.410 Manual

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
Fleetweld 5P
Fleetweld 5P+
Fleetweld 35
Fleetweld 7
Fleetweld 37
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.
Class
E6010
E6010
E6011
E6012
E6013
-18-
Alternate
E6011
E6011
E6010
E6013
E7014