82205 - Bohler E7018-1 Low Hydrogen Stick Electrode 2.5mm

Technical Overview: Bohler E7018-1 Stick Electrode

The Bohler E7018-1 is a premium basic-coated, low-hydrogen stick electrode designed for the shielded metal arc welding (SMAW) of carbon and low-alloy steels. Engineered to meet the rigorous requirements of the AWS A5.1 E7018-1 classification, this electrode provides exceptional mechanical properties, specifically high impact toughness at temperatures as low as -45°C. The 2.5mm diameter is optimized for precision work on thinner sections or for root passes in heavy wall pipes and plates.

Metallurgically, the electrode deposits a weld metal with very low diffusible hydrogen content (typically less than 4ml/100g), significantly reducing the risk of hydrogen-induced cracking (cold cracking) in the heat-affected zone (HAZ). This makes it a preferred choice for welding fine-grained structural steels and restrained joints where stress concentrations are a concern. The coating formulation ensures a stable arc on both DC+ and AC polarities, providing versatility across different power sources.

The electrode exhibits excellent operability in all positions, including vertical-up, with a concentrated arc that ensures deep penetration and reliable fusion. The slag system is designed for easy removal, often self-releasing, which improves productivity by reducing post-weld cleaning time. It is particularly suited for industries requiring high radiographic quality, such as offshore fabrication, pressure vessel manufacturing, and pipeline construction.