ED030631 - Lincoln Electric SuperArc L-56 ER70S-6 MIG Wire - 2 lb Spool

Premium Mild Steel MIG Wire for Dirty Plate

The Lincoln Electric SuperArc® L-56® is a premium copper-coated ER70S-6 solid MIG wire designed to handle the rigors of general fabrication where base metal preparation may not be perfect. Packaged in a convenient 2 lb plastic spool, this wire is specifically tailored for smaller MIG welding machines often used in light fabrication, automotive repair, and hobbyist applications. The L-56® formulation is legendary in the welding industry for its high levels of manganese and silicon deoxidizers. These chemical additions allow the wire to tolerate moderate to high amounts of mill scale, oil, and contaminants on the steel surface, producing sound, porosity-free welds where other wires might fail.

One of the standout features of the SuperArc® L-56® is Lincoln's proprietary manufacturing process, which includes the MicroGuard® surface treatment. This advanced copper coating does more than just prevent rust on the spool; it ensures exceptional feedability through the gun liner and contact tip. Smooth feeding is critical for maintaining a stable arc, especially when using smaller diameter wires on compact machines. The consistent diameter and cast of the wire reduce friction and drag, minimizing the risk of "bird-nesting" at the drive rolls.

This wire is versatile enough to support all major metal transfer modes, including short-circuiting, globular, axial spray, and pulsed spray transfer. It performs exceptionally well with both 100% CO2 shielding gas and Argon/CO2 blends (such as C25). When used with a C25 blend, the L-56® produces minimal spatter and a flat, aesthetically pleasing bead profile with excellent wetting action at the toes of the weld. Whether you are welding structural steel, sheet metal, or piping, the SuperArc® L-56® delivers the consistency and quality professional welders demand.

Technical Specifications & Performance

The ER70S-6 classification indicates a minimum tensile strength of 70,000 psi, making it suitable for most mild steel structural applications. The "S-6" designation specifically highlights the higher silicon content, which increases the fluidity of the weld puddle and improves bead wetting. This makes it an excellent choice for fillet welds where a smooth transition to the base metal is desired to reduce stress concentrations. The 2 lb spool size is perfect for portability and low-volume jobs, ensuring you have fresh, high-quality wire ready for repair work without the bulk of industrial drums.