S422032-031 - Hobart 7018 XLM Low Hydrogen Stick Electrode 3/32-Inch 50lb Can

Technical Overview of Hobart 7018 XLM Electrodes

The Hobart 7018 XLM is a premium quality, low-hydrogen iron powder electrode designed to meet the rigorous demands of critical structural welding. Classified as an AWS E7018 H4R (and typically meeting E7018-1 requirements), this electrode is formulated with an "Extra Low Moisture" (XLM) coating. This proprietary coating significantly reduces the rate of moisture absorption from the atmosphere, a critical factor in preventing hydrogen-induced cracking (cold cracking) in high-strength carbon and low-alloy steels. The H4R designation confirms that the electrode deposits less than 4ml of diffusible hydrogen per 100g of weld metal and is moisture resistant.

Metallurgically, the addition of iron powder to the coating enhances the deposition rate, allowing for faster travel speeds and improved productivity compared to non-iron powder low-hydrogen electrodes. The 3/32-inch diameter is particularly versatile, suitable for root passes in heavy sections or for welding thinner gauge materials where heat input control is paramount. The electrode operates effectively on both Direct Current Electrode Positive (DCEP) and Alternating Current (AC), providing flexibility across different power sources. Mechanical properties typically include a tensile strength exceeding 70,000 psi and excellent Charpy V-Notch impact toughness at sub-zero temperatures, making it suitable for applications requiring ductility and crack resistance.

The 50lb hermetically sealed can ensures the electrodes remain factory-dry until opened. For code-quality work, proper storage and reconditioning procedures should be followed once the container is breached, although the XLM coating provides a wider window of usability. This electrode is engineered for X-ray quality welds, ensuring defect-free joints in pressure vessels, structural steel, and heavy machinery.