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WELD DEFECTS AND POSSIBLE CAUSES
WELD DEFECT
Excessive
Convexity
Insufficient Throat
Undercut
Insufficient Leg
Size
Poor Penetration
Poor Fusion
Overlap
Porosity
Slag Inclusions
Cracks
Excessive Spatter
Slow travel speed that allows weld metal to build up
A combination of Travel speed to fast and current too high
Improper placement of weld beads when multiple pass welding
Arc length too long increasing the force of the arc so that it cuts into corners
Improper weld technique causing the corners to be left unfilled or cut into
Groove joint not completely filled and overlapped
Using the wrong electrode angle causing the weld to be deposited too heavily on
Using the wrong angle on multiple pas welds Causing the welds to overlap
Using too large an electrode for the root of the joint
Improper electrode angle at the root of the joint
Using the wrong electrode for the desired joint penetration: (using E-6013 instead of
Improper electrode angle at the sides of the joint
Improper weave technique that does not allow enough time at the sides of the joint
Using the wrong electrode for the application
Amperage too low and /or travel speed too slow
Dirty base metal painted or galvanized surfaces
Arc length too long especially with E-7018 Electrodes
Wind or fans strong enough to break down the shielding gas
Improper manipulation of the electrode especially with E-6013
Improper cleaning and slag removal between multiple pass welds
Using the wrong Electrode for the application
Using Excessively high amperage on some metals
POSSIBLE CAUSES
Welding currents too low
Amperage too high
one side
incorrectly
Amperage too low
Travel speeds too fast
Improper weave technique
E-6010)
Amperage too low
Travel speeds too fast
Electrode too large with low currents
Moisture in low hydrogen electrodes
Amperage too high
Electrode angle too extreme
Arc length too long
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