1
Electrode
Figure
8-11.
Tee
Joint
Figure
8-12.
Lap
Joint
8-2.
Welding
Troubleshooting
Table
8-1.
Porosity
~
Porosity
small
cavities
or
holes
resulting
from gas
pockets
in
weld
metal.
Possible
Causes
Corrective
Actions
Arc
length
too
long.
Reduce
arc
length.
Damp
electrode.
Use
dry
electrode.
Workpiece
dirty.
.
Remove
all
grease,
oil,
moisture,
rust,
paint,
coatings,
slag,
and
dirt
from
work
surface
before
welding.
2
Fillet
Weld
Keep
arc
short
and
move
at
definite
rate
of
speed.
Hold
electrode
as
shown
to
provide
fusion
into
the
corner.
Square
edge
of
the
weld
surface.
For
maximum
strength
weld
both
sides
of
upright
section.
3
Multi-Layer
Deposits
Weld
a
second
layer
when
a
heavi
er
fillet
is
needed.
Use
any
of
the
weaving
patterns
shown
in
Figure
8-8.
Remove
slag
before
making
another
weld
pass.
S-0060
/
S-0058-A
/
S-OO61
2
1
Electrode
300
Or
Less
2
Single-Layer
Fillet
Weld
Move
electrode
in
circular
motion.
3
Multi-Layer
Fillet
Weld
1
Weld
a
second
layer
when
a
heavi
er
fillet
is
needed.
Remove
slag
be
fore
making
another
weld
pass.
Weld
both sides
of
joint
for
maxi
mum
strength.
Single-Layer
Fillet
Weld
Multi-Layer
Fillet
Weld
S~oo63
/S-0064
3
OM-160
518
Page
25