1170S6030 - ER70S-6 Mild Steel Solid MIG Wire, 0.030 Inch, 11 lb Spool

Industrial Grade ER70S-6 Solid MIG Wire

This ER70S-6 mild steel MIG welding wire is engineered for general purpose fabrication where consistent mechanical properties and reliable feedability are paramount. The "S-6" classification indicates a higher content of manganese and silicon compared to S-3 or S-2 wires. These added deoxidizers serve a critical function in industrial environments: they scavenge oxygen from the weld pool, significantly reducing the risk of porosity when welding over base metals that may have light rust, mill scale, or oil. This makes the wire an excellent choice for structural steel applications, heavy equipment repair, and manufacturing lines where surface preparation cannot always be perfect.

The 0.030-inch (0.8mm) diameter strikes a versatile balance, offering enough deposition rate for medium-thickness plates while retaining the ability to weld thinner gauge sheet metal often found in HVAC ductwork and automotive body panels. The wire is precision layer-wound on an 11 lb spool, which typically fits smaller portable MIG welders as well as industrial wire feeders equipped with the appropriate spindle adapters. The spool size is ideal for maintenance and repair operations (MRO) requiring portability without the frequent change-overs associated with smaller 2 lb spools.

Manufactured with a high-quality copper coating, this wire ensures optimal electrical contact between the wire and the contact tip. This coating not only improves arc initiation and stability but also extends the life of consumables by reducing friction and heat buildup in the gun liner and tip. The wire is designed to operate effectively with both 100% CO2 shielding gas—for deeper penetration and lower cost—and Argon/CO2 blends (such as C25), which provide a smoother arc, reduced spatter, and better bead appearance. It meets AWS A5.18 specifications, ensuring it delivers a minimum tensile strength of 70,000 PSI, suitable for code-quality work in construction and fabrication sectors.

Key Technical Benefits:

• Enhanced Deoxidation: High Si/Mn levels combat porosity on contaminated surfaces.
• Feedability: Precision winding and copper coating prevent bird-nesting and liner drag.
• Versatility: Suitable for Short Circuit, Globular, and Spray Transfer modes depending on gas and settings.