S295143-S71 - Hobart SDX S2Si EM12K Submerged Arc Wire 1/8 Inch 1000lb Drum

Hobart SDX S2Si EM12K Submerged Arc Welding Wire

The Hobart SDX S2Si is a premium copper-coated carbon steel solid wire designed specifically for the submerged arc welding (SAW) process. Classified as EM12K under AWS A5.17 standards, this wire is engineered to provide superior weldability and mechanical properties in both single-pass and multiple-pass applications. Its chemical composition features a medium level of manganese and silicon, which act as effective deoxidizers, helping to minimize porosity and ensure sound weld deposits even on base metals with slight surface contaminants.

One of the standout features of the SDX S2Si is its high-quality copper coating. This finish not only protects the wire from oxidation during storage but also significantly enhances electrical conductivity at the contact tip. This results in a stable arc and consistent heat transfer, which are critical for achieving uniform penetration and bead profile. Furthermore, the smooth copper surface reduces friction within the liner and contact tip, promoting excellent feedability—a crucial factor when welding with long conduit runs or in automated setups.

This specific product comes in a substantial 1000 lb drum, making it an ideal choice for high-volume industrial environments where minimizing downtime is essential. The large payoff pack reduces the frequency of spool changes, allowing for continuous operation in automated or robotic welding cells. It is widely compatible with a broad range of fluxes, allowing fabricators to tailor the arc characteristics and slag systems to their specific project requirements, whether joining non-alloyed structural steels or fine-grain pressure vessel grade materials.

Industries such as heavy equipment manufacturing, railcar fabrication, shipbuilding, and wind tower construction rely on the Hobart SDX S2Si for its versatility and reliability. Whether you are welding thick structural components, storage tanks, or pipe double-jointing, this wire delivers the consistent performance professional fabricators demand. Its ability to produce high-quality welds with good impact toughness makes it a staple in the heavy fabrication sector.