www.parweld.com
Problem
Cause/Corrective Action
Incomplete fusion to base
metal
Work piece dirty.
Remove all grease, oil,
moisture, rust, paint,
coatings, and dirt from
work surface before
welding.
Insufficient heat input.
Select higher voltage
range and/or adjust wire
feed speed.
Improper welding
technique. Place
stringer bead in proper
locations) at joint during
welding.
Adjust work angle or
widen groove to access
bottom during welding.
Momentarily hold arc
on groove side walls
when using weaving
technique.
Keep arc on leading
edge of weld puddle.
Use correct gun angle of
0 to 15 degrees.
Excessive Penetration
– weld metal melting
through base metal and
hanging underneath
weld.
Excessive heat input.
Select lower voltage
range and reduce wire
feed speed.
Increase travel speed.
Problem
Cause/Corrective Action
Lack Of Penetration -
shallow
Fusion between weld
metal and
Base metal.
Improper joint
preparation. Material
too thick. Joint
preparation and design
must provide access to
bottom of groove while
maintaining
Proper welding wire
extension and arc
characteristics.
Improper weld
technique. Maintain
normal gun angle of 0
to 15 degrees to achieve
maximum penetration.
Keep arc on leading
edge of weld puddle.
Ensure welding wire
extends not more than
13 mm beyond nozzle.
Insufficient heat input.
Select higher wire feed
speed and/or select
higher voltage range.
Reduce travel speed.
Burn-Through - weld
metal melting
Completely through base
metal
Resulting in holes where
no metal remains.
Excessive heat input.
Select lower voltage
range and reduce wire
feed speed.
Increase and/or
maintain steady travel
speed.
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