Lincoln Electric C2.410 manual Low Hydrogen Welding, E7018-1

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.

Procedures

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) Techniques

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 Welding 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.

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