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Table
8-2.
Excessive
Spatter
.
.
~.....
~
~~-
Excessive
Spatter
scattering
of
molten
metal
particles
that
cool
to
solid
form
near
weld
bead.
Possible
Causes
Corrective
Actions
Amperage
too
high
for
electrode.
Decrease
amperage
or
select
larger
electrode.
Arc
length
too
long
or
voltage
too
high
Reduce
arc
length
or
voltage.
Table
8-3.
Incomplete
Fusion
Incomplete
Fusion
failure
of
weld
metal
\
to
fuse
completely
with
base
metal
or
a
preceeding
weld
bead.
hr11
Possible
Causes
Corrective
Actions
Insufficient
heat
input.
Increase
amperage.
Select
larger
electrode
and
increase
amperage.
Improper
welding
technique.
Place
stringer
bead
in
proper
location(s)
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.
Workpiece
dirty.
Remove
all
grease,
oil,
moisture,
rust,
paint,
coatings,
slag,
and
dirt
from
work
surface
before
welding.
Table
8-4.
Lack
Of
Penetration
Lack
Of
Penetration
shallow
fusion
be
tween
weld
metal
and base
metal.
Lack
of
Penetration
Good
Penetration
Possible
Causes
Corrective
Actions
Improper
joint
preparation.
Material
too
thick.
Joint
preparation
and
design
must
provide
access
to
bottom
of
groove.
Improper
weld
technique.
Keep
arc
on
leading
edge
of
weld
puddle.
Insufficient
heat
input.
Increase
amperage.
Select
larger
electrode
and
increase
amperage.
Reduce
travel
speed.
OM-160
518
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