69102012 - Bonarc ER70S-6 .045 Solid MIG Wire 20kg Spool

Premium Bonarc ER70S-6 .045" MIG Welding Wire

The Bonarc ER70S-6 .045" MIG Wire is a high-quality, copper-coated solid steel wire designed for the Gas Metal Arc Welding (GMAW) process. Packaged in a substantial 20kg (approximately 44lb) spool, this product is tailored for industrial fabrication shops and heavy-duty manufacturing environments where minimizing downtime for consumable changeovers is critical. The ER70S-6 classification indicates that this wire is formulated with higher levels of manganese and silicon compared to S-3 wires. These added deoxidizers act as powerful cleaning agents within the weld pool, making this wire an excellent choice for welding on base metals that may have light rust, mill scale, or oil present. This forgiveness ensures sound, porosity-free welds even when surface preparation is not perfect.

Engineered for versatility, the Bonarc 70S-6 wire performs exceptionally well with both 100% CO2 shielding gas and Argon/CO2 mixtures (such as C25). When used with a mixed gas, it produces a smooth spray transfer with minimal spatter, resulting in a clean, professional bead appearance that requires little post-weld cleanup. The precise layer winding and consistent copper coating of the wire ensure smooth feeding through the MIG gun liner and contact tip, reducing the risk of burn-backs and bird-nesting. This reliability is essential for automated or semi-automated welding processes where feed consistency directly impacts productivity.

This .045" diameter wire is particularly well-suited for welding medium-to-heavy thickness structural steel plates, pipe, and heavy equipment components. It offers excellent wetting characteristics, ensuring good fusion at the toes of the weld. Whether you are working on automotive frames, general construction, or pressure vessels, the Bonarc ER70S-6 provides the mechanical properties—including a minimum tensile strength of 70,000 psi—required to meet rigorous industry standards. The 20kg spool fits standard wire feeders capable of handling larger spools, providing a cost-effective solution for high-volume welding operations.