9. CORRECT ELECTRODE
The correct choice of electrode size involves
consideration of a variety of factors, such as
the type, position, and preparation of the
joint, the ability of the electrode to carry high
current values without injury to the weld
metal or loss of deposition efficiency.
11. Prefix “E” = ELECTRODE
FIRST & SECOND DIGIT = TENSILE STRENGTH
THIRD DIGIT = POSITION
1= ALL POSITION 3= FLAT POSITON
2= HORIZONTAL AND FLAT POSITION
FOURTH DIGIT= COATING
Titania potassium
(resistant to corrosion in se water and chlorine)
Electrode E-6013
60,000 PSI MINIMUM TENSILE ALL position
STRENGTH
16. Amps too high
The bead is wide, flat and irregular, and
a small undercut can be seen on the side
of the weld.
The slag is difficult to remove from the
edges of the weld.
21. Arc Length Too Short
The surface of the weld is uneven
where it has been dragged along
by the rod, and the weld will be
low on power and contain slag
inclusions.
22.
23. Arc Length Too Long
Too great distance between the rod and
the work will increase the voltage
resulting in a flat and wide weld with a
great deal of spatter. It also makes the
arc unstable, and the slag will be
difficult to remove from the edges of
the weld.
27. Speed Too Fast
Excessive speed results in a thin, weak bead. The
ridges in the weld are elongated and triangular.
28. Speed OK
The bead is fairly consistent. The ridges in the weld
are semi-circular. The suggested travel speed for
SMAW is 3 to 6 inches per minute (ipm)/ 75- 150
mm per minute.
30. The electrode angle is of
particular importance in
fillet welding and deep
groove welding.
Generally speaking the
angle between the plates
should perpendicular to
the line of weld.
