Pick the rod and diameter to see a general starting range, then verify the electrode manufacturer data.
Reviewed 2026-10-07
Start inside the manufacturer range. If the rod sticks constantly and the arc feels weak, increase current slightly. If the puddle is uncontrollable, undercut is severe or the rod glows, reduce current and check technique.
Vertical and overhead welding often use different current/technique than flat work. Electrode classification and procedure requirements also matter.
Low-hydrogen electrodes have storage/exposure requirements. Follow the electrode manufacturer and applicable code/WPS rather than treating all “7018” as identical.
Tools that match this task — not a random product wall.
Rod brand, diameter, position, machine and arc length all affect a good setting. Use the manufacturer range as the primary reference.
DCEP is common, and some products are formulated for AC. Check the specific electrode label.
They have different flux systems, arc characteristics and typical use cases. Technique and polarity can differ.