ED035242 - Lincoln ER409NB 1/16" Stainless TIG Welding Rods - 10lb Tube

Lincoln Electric ER409NB Stainless Steel TIG Rod

The Lincoln Electric ER409NB is a premium ferritic stainless steel TIG welding rod designed specifically for joining Type 409 stainless steels. This consumable is formulated with the addition of Niobium (Nb), a critical stabilizing element that reacts with carbon to form stable carbides. This reaction prevents the formation of chromium carbides, thereby significantly enhancing the corrosion resistance of the weld deposit and promoting a stable ferritic microstructure. It is an essential consumable for industrial fabrication involving thin-gauge stainless steel where oxidation resistance is paramount.

Engineered for precision and reliability, this rod features Lincoln's advanced manufacturing quality, including ink-jet printing along the entire length of the electrode for instant identification—a crucial feature for quality control in busy shop environments. The ER409NB is optimized for use with 100% Argon shielding gas and performs best under low heat input procedures. Excessive heat input should be avoided to prevent grain growth in the heat-affected zone (HAZ), which can compromise mechanical toughness. This rod is primarily recommended for single-pass applications.

Key Industrial Applications:

• Automotive exhaust system fabrication and repair


• Manufacturing of catalytic converters


• Welding of manifolds and mufflers


• General fabrication of 409 grade ferritic stainless steels

Supplied in a durable 10lb carton, these 1/16" (1.6mm) rods are cut to standard 36-inch lengths, ensuring compatibility with standard TIG welding workflows. The consistent chemical composition ensures repeatable, high-quality welds that meet the rigorous demands of the automotive and industrial sectors.