ED511231 - Lincoln 7018 AC 1/8" Welding Rods

Premium AC Performance with Lincoln 7018 AC Electrodes

The Lincoln Electric 7018 AC Stick Electrode (3.2mm) is a specialized welding consumable designed to bridge the gap between high-strength low-hydrogen requirements and the limitations of AC power sources. While standard E7018 electrodes are industry staples for structural steel, they can often be difficult to run on Alternating Current (AC) machines due to arc instability and outages. Lincoln Electric has formulated this specific 7018 AC variant to maintain a smooth, consistent arc even when the current passes through the zero point of the AC cycle, ensuring professional results for welders using "buzz box" style machines or industrial AC transformers.

One of the primary challenges in stick welding is "arc blow," a phenomenon where magnetic fields distort the arc, causing it to wander and creating defects. This is prevalent in DC welding, especially near corners or ends of joints. By utilizing AC power with the Lincoln 7018 AC electrode, operators can effectively neutralize magnetic arc blow, making this rod an excellent problem-solver for complex joint geometries and magnetized steel repairs. Despite its optimization for AC, this electrode also performs exceptionally well on Direct Current Electrode Positive (DCEP), offering versatility across different equipment setups.

Beyond its electrical characteristics, this electrode delivers the mechanical properties expected of the E7018 classification. It deposits high-quality weld metal with excellent ductility and impact toughness, suitable for code-quality work on mild and low-alloy steels. The 3.2mm (1/8") diameter is the most versatile size, capable of handling medium-to-thick plate applications while still being manageable for vertical and overhead position welding. The flux coating is engineered to provide easy slag release and a clean bead appearance, reducing post-weld cleanup time.

Key Benefits for Industrial Maintenance

Maintenance and Repair Operations (MRO) often require welding on varied equipment where surface preparation isn't perfect or where the available power source is limited. The Lincoln 7018 AC offers a forgiving arc that helps bridge gaps and manage less-than-ideal fit-ups. Its easy restrike capability is particularly beneficial for tack welding and stitch welding applications, reducing the frustration of rod sticking.