S295150-S71 - Hobart SDX S2Si EM12K Submerged Arc Wire 5/32 1000lb Drum

Technical Overview of Hobart SDX S2Si

The Hobart SDX S2Si is a premium quality, copper-coated solid wire electrode designed specifically for the Submerged Arc Welding (SAW) process. Classified as an EM12K under AWS A5.17 standards, this wire features a medium manganese and high silicon chemical composition. The elevated silicon content (nominal 0.25-0.35%) serves as a powerful deoxidizer, significantly enhancing the fluidity of the weld pool. This results in superior wetting action at the toes of the weld, reducing the risk of undercut and promoting a flat, smooth bead profile even at higher travel speeds.

Engineered for versatility, the SDX S2Si is suitable for both single-pass and multi-pass welding operations on carbon and low-alloy steels. Its chemical formulation provides excellent tolerance to surface contaminants such as mill scale and light rust, making it a robust choice for general fabrication environments where surface preparation may vary. When paired with appropriate Hobart fluxes, this wire delivers consistent mechanical properties, including reliable tensile strength and impact toughness.

The product is supplied in a bulk 1000 lb (453.6 kg) drum, designated for high-duty cycle industrial applications. The drum packaging utilizes a tangle-free payout system designed to support continuous, automated welding cells, thereby maximizing arc-on time and reducing the frequency of consumable changeovers. The copper coating on the wire surface not only prevents corrosion during storage but also ensures optimal electrical contact at the contact tip, reducing tip wear and ensuring stable arc characteristics throughout the lifespan of the drum.

Chemical Composition & Performance: The "K" in EM12K denotes the silicon killed steel composition. This specific chemistry is critical for applications requiring porosity-free welds in non-killed or semi-killed base metals. It is widely compatible with both neutral and active fluxes, allowing welding engineers to tailor the process to specific joint requirements, whether for deep penetration fillets or high-speed butt welds.