ED032591 - Excalibur 7018-1 MR 3/32" Stick Electrode - 10lb Can

Advanced Metallurgical Performance for Critical Structures

The Lincoln Electric Excalibur® 7018-1 MR® is a premium mild steel, low hydrogen stick electrode designed to meet the rigorous demands of critical industrial applications. Engineered with a specialized coating, this electrode is classified as AWS E7018-1 H4R, indicating its superior resistance to moisture pickup and its capability to deposit weld metal with diffusible hydrogen levels below 4mL per 100g. This low-hydrogen characteristic is essential for preventing hydrogen-induced cracking (cold cracking) in heavy-section structural steel and pressure vessel fabrication.

One of the defining technical attributes of the Excalibur 7018-1 MR is its compliance with the chemical composition recommendations of API 751, making it a preferred choice for the petrochemical and offshore industries. The electrode is manufactured under Lincoln Electric's Q2 Lot® program, which provides lot-controlled chemistry and mechanical properties. This ensures that every batch meets or exceeds specified toughness requirements, specifically delivering high impact values at temperatures as low as -50°F (-45°C). This low-temperature impact toughness distinguishes the 'dash-1' classification from standard E7018 electrodes, rendering it suitable for projects where ductility at sub-zero temperatures is a safety-critical parameter.

The 3/32-inch (2.4 mm) diameter allows for precise heat input control, suitable for root passes or thin-wall pipe welding. The electrode operates effectively on both DCEP and AC polarities, providing versatility across different power sources. The 'MR' (Moisture Resistant) coating significantly extends the allowable atmospheric exposure time compared to standard coatings, reducing the frequency of re-baking and ensuring consistent weld quality in humid field environments.