©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
IV With a somewhat
lower strength weld metal as the filler, the yield point of the weld metal is
reached during the shrinkage on cooling.
The weld metal stretches without overloading in the
heat affected zone of the steel and
there is no cracking. 4.5.3
Equipment
- The electrode selected will operate only on the appropriate
power source.
Table 4 lists the type of current for which each class of electrode is designed.
TABLE 4. Current Requirements
for AWS Electrode Classes Electrode
Class Current
EXX10-X*
DCRP EXX11-X
AC or DCEP EXX13-X
AC or DC either polarity
EXX15-X DCEP
EXX16-X AC
or DCEP EXX18-X
AC or DCEP EXX20-X
AC or DCEN (horizontal fillet)
AC or DC either polarity (flat)
EXX27-X AC
or DCEN (horizontal fillet) AC
or DC either polarity (flat) *
"X" indicates a variable in the classification.
