S422032-035 - Hobart 7018 XLM 3/32 Stick Electrodes 50lb Can

Technical Analysis: Hobart 7018 XLM (E7018-1 H4R)

The Hobart 7018 XLM is a high-performance iron powder, low-hydrogen electrode classified under AWS A5.1 as E7018-1 H4R. This classification indicates a tensile strength of at least 70,000 psi, all-position capability, and improved impact toughness at lower temperatures (indicated by the "-1" suffix) compared to standard E7018 electrodes. The "H4R" designator is particularly significant for critical applications; it certifies that the electrode deposits less than 4ml of diffusible hydrogen per 100g of weld metal and maintains this moisture resistance even after exposure to high-humidity environments for extended periods.

Engineered for the Shielded Metal Arc Welding (SMAW) process, the 7018 XLM features a heavy coating containing iron powder. This addition increases the deposition rate, allowing for faster travel speeds and improved productivity in heavy fabrication environments. The electrode is designed to operate on both DCEP (Direct Current Electrode Positive) and AC (Alternating Current). On DCEP, it provides deep penetration and excellent fusion, while its AC performance is notably smooth, minimizing arc blow which can be problematic in complex joint geometries or when welding near the ends of plates.

The 3/32-inch (2.4 mm) diameter is ideal for root passes in heavy plate or for welding on thinner gauge materials where heat input control is critical. The slag system is chemically balanced to provide excellent coverage, protecting the molten weld pool from atmospheric contamination while solidifying in a manner that allows for easy removal. This is essential for multi-pass welding scenarios, such as those found in offshore rig construction, pressure vessel fabrication, and power plant erection, to prevent slag inclusions. The hermetically sealed 50 lb can ensures that the electrodes remain within AWS moisture specifications during storage and transport, reducing the immediate need for reconditioning in a rod oven upon opening.

Industrial Applications:

• Low alloy structural steel fabrication
• Field erections and steel structures
• Offshore platforms and shipbuilding
• Petrochemical piping and pressure vessels
• Heavy equipment manufacturing and repair