EDM568004 - Murex .045 ER70S-6 Mild Steel MIG Wire - 44lb Spool

Industrial Grade ER70S-6 Solid MIG Wire

The Murex S6 .045 MIG Wire is a premium mild steel solid wire formulated to meet AWS A5.18 ER70S-6 classifications. This wire is engineered with elevated levels of silicon and manganese, which act as powerful deoxidizers during the welding process. These chemical properties make it significantly more forgiving than ER70S-3 wires when welding on base metals that exhibit surface contaminants such as mill scale, light rust, or oil. The wire is designed for use with Direct Current Electrode Positive (DCEP) polarity and operates effectively with both 100% Carbon Dioxide (CO2) and Argon/CO2 shielding gas mixtures.

This 44lb (20kg) spool is sized for industrial wire feeders commonly found in fabrication shops, manufacturing plants, and heavy equipment repair facilities. The 0.045-inch diameter is a versatile choice for medium-to-heavy plate thicknesses, offering higher deposition rates than 0.035-inch wires while maintaining control in out-of-position welds when using short-circuit transfer. The copper coating on the wire ensures excellent electrical conductivity and protects the wire from corrosion during storage, while also facilitating smooth feeding through the liner and contact tip to reduce downtime associated with bird-nesting or burn-backs.

Technically, the increased manganese content also serves to increase the tensile strength of the weld deposit, ensuring robust joints in structural applications. It is suitable for single-pass welds on sheet metal where travel speed is critical, as well as multiple-pass welds on thick sections used in construction and mining equipment. The wire produces a flat to slightly convex bead profile with excellent wetting action, minimizing post-weld grinding and cleanup.