OM-291417 Page 64
Burn-Through - weld metal melting completely through base metal resulting in holes where no
metal remains.
Possible Causes Corrective Actions
Excessive heat input. Select lower amperage. Use smaller electrode.
Increase and/or maintain steady travel speed.
Waviness Of Bead - weld metal that is not parallel and does not cover joint formed by base
metal.
Possible Causes Corrective Actions
Unsteady hand. Use two hands. Practice technique.
Distortion - contraction of weld metal during welding that forces base metal to move.
Illustration: Base metal moves in the direction of the weld bead.
Possible Causes Corrective Actions
Excessive heat input. Use restraint (clamp) to hold base metal in position.
Make tack welds along joint before starting welding operation.
Select lower amperage for electrode.
Increase travel speed.
Weld in small segments and allow cooling between welds.
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