ED031414 - Lincoln SuperArc LA-90 .045" MIG Wire - 33lb Spool (ER90S-D2)

Superior Arc Stability and Feedability with SuperArc LA-90

Welders looking for a reliable, high-performance MIG wire for low alloy steel applications will find the Lincoln Electric SuperArc® LA-90™ to be an exceptional solution. This 0.045-inch solid wire is formulated to produce high-strength welds with tensile properties between 80 and 90 ksi. It is dual-classified as ER90S-D2 and ER80S-D2, making it versatile for various procedure requirements. The wire's copper coating aids in electrical conductivity and protects against corrosion during storage, ensuring the wire is ready to perform when you are.

The key to the LA-90's performance lies in its Microguard® Ultra surface treatment. For the welder, this means superior feedability through the gun liner and contact tip. Unlike inferior wires that may flake or clog the liner with copper shavings, the LA-90 feeds smoothly, ensuring a stable arc and reducing the frustration of burn-backs or bird-nesting. This stability is crucial when welding in different transfer modes, including short-circuit, spray, and pulsed spray, allowing for precise control over the weld pool and bead appearance.

Metallurgically, the inclusion of 0.50% molybdenum and high manganese levels provides the weld deposit with excellent deoxidizing properties. This helps to control porosity, even when welding over light rust or mill scale, although clean base metal is always recommended for critical work. The alloy composition also ensures that the weld maintains its strength after stress-relieving, which is a common requirement in heavy fabrication and pressure vessel work.

Packaged in a standard 33 lb spool, this wire fits most industrial wire feeders. It is an excellent choice for welding ASTM A302, A533, and similar high-strength steels. Whether you are fabricating heavy machinery, structural frames, or high-pressure piping, the Lincoln SuperArc LA-90 delivers the consistency and mechanical properties needed to pass strict X-ray and ultrasonic testing requirements.