722401025H - Hobart SDX S2Si EM12K Submerged Arc Wire 5/32 Inch 55lb Coil

Technical Overview of Hobart SDX S2Si Submerged Arc Wire

The Hobart SDX S2Si is a premium copper-coated solid wire electrode designed specifically for the Submerged Arc Welding (SAW) process. Classified as EM12K under AWS A5.17 standards, this wire features a medium manganese and nominal 0.25% silicon composition. The elevated silicon content serves as a powerful deoxidizer, making this wire particularly effective when welding on base metals that may have minor surface contaminants such as rust or mill scale. It is engineered to produce sound, porosity-free welds with excellent mechanical properties.

This 5/32-inch (4.0 mm) diameter wire is ideal for high-deposition applications found in heavy industrial fabrication. The chemistry of the SDX S2Si allows it to be paired with a variety of fluxes, including both neutral and active types, providing versatility across different welding procedures. When used with the appropriate flux, it delivers a smooth bead profile with superior wetting action, reducing the need for post-weld grinding and finishing. The wire is suitable for both single-pass and multiple-pass welding operations on mild and low-alloy steels.

Packaged in a 55 lb coil, this product is designed for industrial environments where uptime is critical. The consistent diameter control and high-quality copper coating ensure stable electrical conductivity and smooth feeding through the contact tip, minimizing arc instability and wear on consumables. Whether utilized in the manufacturing of pressure vessels, structural steel beams, or heavy machinery, the Hobart SDX S2Si offers the reliability and performance required for code-quality welds.

Key Technical Specifications:

• Classification: AWS A5.17 EM12K
• Diameter: 5/32" (4.0 mm)
• Chemical Composition: Medium Manganese, High Silicon
• Current Compatibility: DCEN, DCEP, AC (depending on flux and procedure)
• Tensile Strength: Dependent on flux combination