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Low Hydrogen Welding
Low hydrogen electrodes are recommended for three broad
areas of application:
1. On low alloy, high carbon, high sulfur, or other steels where
cracking is a problem.
2. When specified by governing codes.
3. For lowest costs on vertical, overhead and horizontal groove
welds on heavy (over 1/2”) plate.
Pr
ocedures
Vertical Up Groove Welds . . . . . . . . . . . . . . . page 27
Overhead Groove Welds . . . . . . . . . . . . . . . . page 27
Vertical Up Fillet Welds . . . . . . . . . . . . . . . . . . page 28
Overhead Fillet Welds . . . . . . . . . . . . . . . . . . page 28
Horizontal Groove Welds . . . . . . . . . . . . . . . . pages 29-30
Flat Fillet Welds . . . . . . . . . . . . . . . . . . . . . . . pages 31-32
Horizontal Fillet Welds . . . . . . . . . . . . . . . . . . pages 33-34
Recommended
Class
Jetweld LH-70 E7018
Jet-LH78 MR E7018
Excalibur
®
7018 E7018
Excalibur 7018-1 E7018-1
Jetweld LH-3800 (E7028) T
echniques
Employ the same techniques for this High-Deposition electrode
as recommended for E7024 electrodes. Clean the slag from
every bead on multiple pass welds to prevent slag inclusions
which would appear on X-ray inspection.
EXX18 W
elding Techniques
Procedures and techniques for E7018 electrodes can be used
for E8018, E9018, or E11018 Lincoln electrodes.
Polarity - Whenever possible use electrode positive for 5/32” and
smaller electrodes. AC can be used at about 10% higher currents.
Use AC on 3/16” and larger diameter electrodes to minimize arc
blow for best operating characteristics. DC+ can also be used
at about 10% lower currents.