S119851-035 - Hobart 18AC E7018 Stick Electrode 5/32" 50lb Can

Technical Overview of Hobart 18AC E7018

The Hobart 18AC is a specialized Shielded Metal Arc Welding (SMAW) electrode designed to overcome the common arc stability issues associated with running E7018 low-hydrogen electrodes on Alternating Current (AC) power sources. While standard E7018 electrodes often require DC+ polarity for optimal performance, the 18AC features a unique coating formulation containing iron powder that stabilizes the arc even on utility welders with lower open-circuit voltages. This 5/32-inch diameter variant is supplied in a 50 lb hermetically sealed can to ensure moisture resistance and immediate readiness for critical applications.

This electrode meets AWS A5.1 classification E7018. It provides a weld deposit with 70,000 PSI minimum tensile strength and excellent ductility. The addition of iron powder to the coating not only assists in arc stabilization but also improves deposition rates compared to non-iron powder electrodes. It is capable of welding in all positions—flat, horizontal, vertical, and overhead—making it a versatile choice for structural fabrication where out-of-position welds are frequently required.

One of the defining technical characteristics of the Hobart 18AC is its restrike capability. The formulation prevents the formation of a non-conductive slag cap over the tip of the rod upon extinguishing the arc, facilitating immediate re-ignition. This makes it particularly suitable for skip welding and tacking operations where frequent stops and starts are necessary. It is compatible with AC, DC Electrode Negative (DCEN), and DC Electrode Positive (DCEP), offering broad equipment compatibility.

Applications include the welding of low, medium, and high-carbon steels. It is widely utilized in general fabrication, maintenance repair operations (MRO), and structural steel erection where AC power sources are the primary equipment available. Proper storage in a rod oven is recommended after opening the hermetically sealed container to maintain its low-hydrogen status and prevent porosity.