72220414FH - Hobart SDX S2Si EM12K SAW Wire 5/64 1000lb Drum

Technical Analysis: 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 features a medium manganese (nominally 1.0%) and medium silicon (nominally 0.5%) chemical composition. This specific alloying balance serves as an effective deoxidizer, allowing the wire to perform exceptionally well on steels that may have moderate levels of rust or mill scale, while still maintaining high ductility and impact toughness in the weld metal.

Engineered for versatility, the SDX S2Si is suitable for both single-pass and multi-pass welding applications. The medium silicon content aids in wetting action, producing a flat weld bead with smooth tie-ins, which is critical for fatigue resistance in structural applications. The manganese content contributes to the tensile strength and hardness of the deposit without compromising crack resistance. When paired with appropriate fluxes, such as Hobart's SWX series, this wire can achieve mechanical properties that meet or exceed rigorous industry standards for pressure vessels, structural steel, and heavy equipment fabrication.

The 5/64-inch diameter offers a balance between deposition rate and penetration profile, making it a standard choice for medium-to-heavy plate fabrication. The copper coating on the wire surface serves dual purposes: it enhances electrical conductivity at the contact tip for stable arc initiation and maintenance, and it provides corrosion resistance during storage. This product is supplied in a 1000 lb drum, designed for high-volume, automated environments where minimizing changeover time is critical to operational efficiency.

Metallurgically, the EM12K classification implies a carbon content typically between 0.05% and 0.15%, ensuring a low risk of hydrogen-induced cracking when proper storage and handling procedures are followed. The wire's consistent diameter control and cast/helix properties ensure reliable feeding through long conduit runs often found in boom-mounted or tractor-driven SAW systems.