MCATL701820-18 - Atlantic CHE507 (E7018) 3.2mm Stick Electrodes

Technical Overview of Atlantic E7018 Electrodes

The Atlantic E7018 (often designated as CHE507 in Atlantic's catalog) is a high-quality carbon steel welding electrode featuring a low-hydrogen potassium iron powder coating. Engineered for the Shielded Metal Arc Welding (SMAW) process, this electrode is designed to deliver exceptional mechanical properties, particularly in applications requiring high tensile strength and resistance to cold cracking. The inclusion of iron powder in the coating significantly improves deposition efficiency, allowing for faster travel speeds and increased productivity compared to standard non-iron powder electrodes.

This 3.2mm (1/8 inch) electrode operates effectively on both AC and DC+ (Direct Current Electrode Positive) polarity. It is characterized by a stable, smooth arc with minimal spatter, which contributes to a high-quality weld bead finish and reduces post-weld cleanup time. The slag system is designed for easy detachability, often self-peeling in optimal conditions. Metallurgically, the deposited metal offers excellent ductility and impact toughness, making it suitable for critical applications where the base metal is subject to high restraint or dynamic loading.

Atlantic E7018 electrodes are manufactured to meet stringent AWS A5.1 standards. They are particularly effective for welding important structures made of carbon steel and low-alloy steel, such as 16Mn grade steels. The low hydrogen content is critical for preventing hydrogen-induced cracking, a common failure mode in heavy structural fabrication. Proper storage and handling are recommended to maintain the low-hydrogen characteristics; if exposed to atmospheric moisture for extended periods, re-baking at 350°C for one hour is standard procedure to restore optimal performance.