S119981-035 - Hobart 418 E7018-1 Low Hydrogen Stick Electrode 1/4" 50lb Can

Hobart 418 E7018-1 Heavy-Duty Stick Electrode

The Hobart 418 is a premium quality, low hydrogen stick electrode designed for critical welding applications where weld integrity and mechanical properties are paramount. Classified as an AWS E7018-1 H4R, this electrode is formulated with an iron powder coating that facilitates high deposition rates and smooth arc characteristics. The 1/4-inch (6.4mm) diameter variant is specifically engineered for heavy fabrication tasks, allowing for significant metal fill in fewer passes compared to smaller diameter rods. It is an excellent choice for welding low alloy structural steels, typically found in bridge construction, shipbuilding, and heavy industrial machinery.

One of the defining characteristics of the Hobart 418 is its exceptional operator appeal. It provides a stable, consistent arc that is easy to control, even at the higher amperages required for a 1/4-inch electrode. The slag system is designed for easy removal, often peeling away with minimal effort, which reduces downtime associated with inter-pass cleaning. This electrode operates effectively on both Direct Current Electrode Positive (DCEP) and Alternating Current (AC), providing flexibility depending on the available power source and specific job requirements. The "-1" suffix in the classification indicates improved impact toughness at lower temperatures, making it suitable for projects subject to harsh environmental conditions.

Moisture resistance is a critical factor in low hydrogen electrodes, and the Hobart 418 excels in this regard. The H4R designation signifies that the coating is resistant to moisture pick-up, reducing the risk of hydrogen-induced cracking in the weld zone. This makes it a reliable option for code-quality work in power generation plants, petrochemical facilities, and pressure vessel fabrication. The 50lb hermetically sealed can ensures that the electrodes remain factory-fresh and dry until opened, preserving their low-hydrogen properties.

Technical Specifications and Performance

The mechanical properties of the weld metal produced by Hobart 418 are robust, typically exceeding the minimum requirements for the E7018-1 classification. With tensile strengths often reaching 84,000 psi and yield strengths around 72,000 psi, welds are strong and ductile. The electrode is particularly well-suited for single and multiple pass applications on carbon and low-alloy steels. While the product is described as "all-position," the 1/4-inch diameter is physically best suited for flat and horizontal fillet welds due to the large volume of molten weld pool it creates.