S305406-019 - Hobart HB-28 ER70S-6 .030" MIG Welding Wire - 2lb Spool

High-Performance Mild Steel MIG Wire for Industrial Fabrication

The Hobart HB-28 .030-inch MIG welding wire is a premium ER70S-6 solid wire designed for the rigorous demands of industrial fabrication and structural repair. Engineered with a chemical composition rich in silicon and manganese, this wire acts as a powerful deoxidizer, effectively scavenging impurities from the weld pool. This characteristic makes the HB-28 particularly well-suited for welding on base metals that may exhibit light to moderate rust, mill scale, or oil, where standard ER70S-3 wires might fail to produce a sound weld. The wire is copper-coated, a critical feature that enhances electrical conductivity at the contact tip and reduces friction within the gun liner, ensuring consistent wire feeding speeds and minimizing arc instability.

Operators utilizing the HB-28 will experience an exceptionally smooth and stable arc profile with minimal spatter, reducing post-weld cleanup time and grinding labor. The wire exhibits excellent wetting properties, allowing the molten puddle to flow out smoothly towards the toes of the weld, creating a flat, uniform bead profile with excellent tie-in to the base metal. This is essential for high-stress applications such as pressure vessels and pipe welding where stress concentrations at the weld toe must be minimized. The 2lb spool format is ideal for portable MIG units and spool guns often used in maintenance and repair operations.

Versatility is a core strength of the Hobart HB-28. It performs reliably under both 100% Carbon Dioxide (CO2) and Argon/CO2 shielding gas mixtures (typically 75/25). While CO2 provides deeper penetration for thicker sections, the Argon blend offers a smoother arc and reduced spatter for thinner gauge materials. This wire is classified as an all-position consumable, making it appropriate for flat, horizontal, vertical, and overhead welding procedures when using short-circuit transfer modes. It meets AWS A5.18 specifications for ER70S-6, guaranteeing mechanical properties including a minimum tensile strength of 70,000 psi, ensuring structural integrity across a wide range of mild and low-alloy steel applications.