ED015790 - Lincoln SuperArc L-56 ER70S-6 MIG Wire .023 12.5lb Spool

Premium Mild Steel MIG Wire for Industrial Fabrication

The Lincoln Electric SuperArc L-56 is the industry benchmark for copper-coated ER70S-6 mild steel MIG welding wire. Engineered for versatility and performance, this 12.5 lb spool of .023-inch (0.6 mm) wire is specifically designed to handle base materials with medium to heavy mill scale, rust, or oil. The wire's chemical composition features elevated levels of manganese and silicon deoxidizers, which act as powerful scavenging agents during the welding process. These elements react with oxygen and impurities in the weld pool to prevent porosity and ensure sound, ductile deposits even on less-than-perfect surfaces.

One of the defining characteristics of the SuperArc L-56 is its superior feedability. Lincoln Electric utilizes their proprietary MicroGuard Ultra surface treatment and precision layer winding to ensure the wire feeds smoothly through the liner and contact tip with minimal drag. This reduces the risk of bird-nesting and arc instability, which is critical when using smaller diameter wires like .023" in complex torch manipulations. The copper coating further enhances electrical conductivity, promoting reliable arc starting and extending the lifespan of consumables by reducing tip erosion.

Metallurgically, the L-56 produces a fluid weld puddle with excellent wetting action (toe-wetting). This results in a flat, smooth bead profile that requires minimal post-weld grinding. It is suitable for all-position welding and supports multiple transfer modes, including short-circuiting, globular, axial spray, and pulsed spray transfer. With a typical yield strength range of 55,000 to 70,000 psi, it meets the rigorous demands of structural and general fabrication codes. This specific spool size is ideal for portable industrial wire feeders and shop environments requiring high-quality, consistent results on mild steel components.