69102009V - Bonarc ER70S-6 .035 Solid MIG Welding Wire - 20kg Spool

Industrial Grade Mild Steel MIG Wire

The Bonarc ER70S-6 .035 Solid MIG Wire is a premium choice for professional fabricators and industrial manufacturing environments requiring consistent, high-quality welds on mild and low-alloy steels. Packaged in a substantial 20kg (44lb) spool, this wire is designed to maximize arc time and reduce changeover frequency in high-volume production settings. As an ER70S-6 classification wire, it contains higher levels of manganese and silicon compared to S-3 wires. These added deoxidizers act as powerful cleaning agents within the weld pool, allowing the wire to tolerate surface contaminants such as light rust, oil, and mill scale without compromising weld integrity.

Engineered for versatility, this wire performs exceptionally well across all welding positions, making it suitable for complex structural assemblies and out-of-position work. It supports various metal transfer modes, including short-circuiting for thin gauge materials and spray transfer for heavier sections. The wire features a high-quality copper coating that serves two critical functions: it enhances electrical conductivity for a stable arc and protects the steel wire from corrosion during storage. Furthermore, the copper coating aids in smooth feeding through the liner and contact tip, significantly reducing friction and wear on consumable parts.

Operators will appreciate the fluid puddle control and excellent wetting action, which results in flat, smooth bead profiles requiring minimal grinding. The formulation is balanced to produce low spatter levels, improving overall efficiency by reducing post-weld cleanup. Whether used with 100% CO2 for deep penetration and economy, or an Argon/CO2 blend for reduced spatter and higher aesthetic quality, the Bonarc ER70S-6 delivers reliable mechanical properties and X-ray quality welds.

Key Industrial Benefits

• High Deoxidizers: Formulated to handle imperfect surface conditions common in general fabrication.


• Consistent Feeding: Precision layer winding ensures the wire pays off the spool smoothly, preventing tangles and bird-nesting.


• Economic Packaging: The 20kg spool size offers a lower cost per pound and longer run times between spool changes compared to standard 15kg or 33lb spools.