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

High-Strength Low Alloy MIG Wire for Critical Applications

The Lincoln Electric SuperArc® LA-90™ is a premium copper-coated MIG wire designed for welding low alloy steels where high tensile strength is a priority. Engineered to meet AWS A5.28 specifications for both ER90S-D2 and ER80S-D2 classifications, this wire delivers weld deposits with tensile strengths ranging from 80,000 to 90,000 psi (552-620 MPa). It is an ideal choice for fabricators working on pressure vessels, piping, and structural components that require superior mechanical properties and reliability.

One of the standout features of the SuperArc LA-90 is its specific chemical composition, which includes 0.50% molybdenum. This addition ensures that the weld metal retains its high strength even after stress-relief heat treatment, making it suitable for applications involving post-weld heat treatment (PWHT). The manganese-molybdenum alloy system provides excellent ductility and toughness, ensuring reliable performance in demanding industrial environments where structural integrity is paramount.

Lincoln Electric has equipped this wire with their proprietary Microguard® Ultra surface treatment. This advanced coating technology significantly improves feeding performance and arc stability compared to standard copper-coated wires. By reducing friction in the liner and contact tip, Microguard Ultra minimizes wire shaving and feeding issues, leading to less downtime and higher productivity. Whether you are using short-circuiting, globular, axial spray, or pulsed spray transfer modes, the LA-90 provides a consistent and smooth welding experience.

Available in a 33 lb spool with a 0.045-inch diameter, this wire is optimized for industrial manufacturing. It is well-suited for welding high-strength low-alloy (HSLA) steels and is frequently used in the automotive, heavy equipment, and process piping industries. When weld integrity and strength are non-negotiable, the SuperArc LA-90 is the professional's choice for durable and code-compliant welds.