ED511231 - Lincoln 7018 AC 1/8" Welding Rods

Reliable Low-Hydrogen Welding for AC Machines

Unlock the full potential of your AC stick welder with Lincoln Electric's 7018 AC Welding Rods. Designed for the professional welder who demands the mechanical integrity of a low-hydrogen deposit but needs the arc stability typically reserved for DC inverters, this 3.2mm (1/8") electrode is a game-changer. Standard 7018 rods often struggle on AC, leading to arc stuttering and difficult starts. Lincoln's proprietary coating formulation ensures that the arc remains ionized and stable throughout the AC cycle, providing a buttery smooth feel that rivals DCEP performance.

This electrode is classified as an AWS E7018, meaning it provides a minimum tensile strength of 70,000 psi, making it suitable for structural steel, heavy equipment repair, and pressure vessel fabrication. The "AC" designation highlights its enhanced runnability on Alternating Current, which is the preferred method for eliminating magnetic arc blow. If you have ever struggled with your arc wandering uncontrollably while welding into a corner or on magnetized pipe, switching to AC with this rod is the solution. It allows for precise puddle control and deep penetration without the interference of magnetic fields.

The 3.2mm diameter is the industry standard "do-it-all" size, perfect for welding plate thicknesses from 1/8" up to unlimited thickness with multi-pass techniques. It features a fast-freezing slag that supports all-position welding, allowing you to run vertical-up stringers or overhead fillets with confidence. The bead profile is flat to slightly convex with fine ripples, and the slag is often self-peeling or easily removed with a light chip.

Storage and Handling

As a low-hydrogen electrode, proper storage is critical to maintaining its resistance to hydrogen-induced cracking. While the Lincoln 7018 AC is robust, it should be stored in a dry environment. For code-critical work, exposure to the atmosphere should be limited, and rods should be held in a rod oven if the package has been open for an extended period. For general shop use and non-critical repairs, keeping the rods dry and warm is usually sufficient to ensure excellent weld quality and porosity-free deposits.