S305406-022 - Hobart HB-28 .030" ER70S-6 Mild Steel MIG Wire - 10lb Spool

High-Performance Mild Steel MIG Wire for Industrial Fabrication

The Hobart HB-28 ER70S-6 Solid MIG Welding Wire (S305406-022) is a premium-grade filler metal designed for general manufacturing and structural fabrication. Engineered with a higher content of manganese and silicon deoxidizers compared to standard ER70S-3 wires, the HB-28 excels in applications where the base metal may have light rust, mill scale, or oil. This chemical composition ensures sound, porosity-free welds even in less-than-ideal surface conditions, making it a staple for heavy equipment repair, tank fabrication, and pipe welding.

This 0.030-inch (0.8 mm) diameter wire is copper-coated to enhance electrical conductivity and ensure smooth wire feeding through the liner and contact tip. The coating significantly reduces friction, minimizing the risk of bird-nesting and promoting a stable arc, which is critical for automated or long-duration manual welding processes. The HB-28 produces a flat bead profile with excellent wetting characteristics, allowing for a smooth tie-in to the base metal. This reduces the need for extensive post-weld grinding and cleanup, improving overall shop productivity.

Versatility is a key strength of the Hobart HB-28. It is compatible with both 100% CO2 shielding gas and Argon/CO2 mixtures (typically 75/25). While CO2 provides deeper penetration, the Argon mixture offers a smoother arc and reduced spatter. The wire is suitable for single and multi-pass welding in all positions (depending on the mode of transfer), making it highly adaptable for diverse projects ranging from automotive bodywork to the construction of pressure vessels. The 10-pound spool size is ideal for portable wire feeders and light industrial MIG machines, offering a balance between portability and run-time.