S295143-S66 - Hobart SDX S2Si EM12K Submerged Arc Wire 1/8 Inch 660lb Drum

Technical Specification: Hobart SDX S2Si (EM12K)

The Hobart SDX S2Si is a premium copper-coated solid wire electrode designed specifically for the Submerged Arc Welding (SAW) process. Classified under AWS A5.17 as EM12K, this wire is formulated with a medium manganese and nominal 0.25-0.35% silicon content. The elevated silicon level distinguishes it from standard EM12 wires, serving as a powerful deoxidizer that enhances the fluidity of the weld puddle. This chemical composition makes the SDX S2Si particularly effective in applications where the base metal may have moderate amounts of rust, mill scale, or other surface contaminants, as the silicon assists in floating out impurities and reducing the risk of porosity.

This specific SKU (S295143-S66) is supplied in a high-capacity 660 lb (approx. 300 kg) drum, often referred to as a payoff pack. This bulk packaging is engineered for high-volume industrial environments, such as pipe mills, pressure vessel fabrication, and structural steel beam manufacturing. The 1/8-inch (3.2mm) diameter allows for substantial deposition rates, making it suitable for welding thicker sections of mild and low-alloy steels. The wire is designed to function with a variety of neutral and active fluxes, allowing welding engineers to tailor the mechanical properties of the weld deposit to meet specific code requirements, including impact toughness at low temperatures.

From a metallurgical perspective, the SDX S2Si produces weld deposits with excellent tensile strength and ductility. The copper coating on the wire ensures consistent electrical contact with the contact tip, reducing arcing and wear, while also providing corrosion resistance during storage. The wire feeding characteristics are optimized for automated systems, ensuring a stable arc and consistent bead profile even at high travel speeds. It is suitable for both single-pass and multi-pass welding procedures in the flat and horizontal positions.