ED036677 - Lincoln Innershield NR-232-H .068 Flux-Cored Wire 25lb

Technical Overview of Lincoln Innershield NR-232-H

The Lincoln Electric Innershield® NR®-232-H is a premium self-shielded flux-cored wire (FCAW-S) designed to meet the rigorous demands of structural steel fabrication. Engineered with a diameter of .068 inches (1.7 mm), this wire is formulated to deliver high deposition rates while maintaining excellent mechanical properties, specifically Charpy V-Notch toughness required for critical applications. It carries the AWS classification E71T-8 and is widely recognized for its compliance with AWS D1.8 Seismic Supplement requirements, making it a staple in the construction of high-rise buildings, bridges, and infrastructure in seismic zones.

This wire operates on DCEN (Direct Current Electrode Negative) polarity and features a fast-freezing slag system that facilitates all-position welding, including difficult vertical-up progression. The "H" designation often indicates controlled hydrogen levels or specific packaging enhancements to ensure weld integrity. The 25lb spool format is optimized for portability on job sites while providing sufficient material for continuous welding operations. Its chemical composition is balanced to resist cracking and ensure deep penetration in plate thicknesses of 3/16 inch (4.8 mm) and heavier.

Ideally suited for single or multiple pass welding, the NR-232-H provides a stable arc and a flat bead profile. It eliminates the need for external shielding gas, reducing equipment complexity and cost in field environments. The wire is packaged to prevent moisture pickup, which is critical for maintaining low hydrogen levels in the deposited weld metal. Industrial professionals rely on this consumable for its consistency, code compliance, and ability to handle poor fit-up conditions often encountered in structural erection.