EX409CB00000350M00 - ER409Nb 0.035" Ferritic Stainless Steel MIG Wire - 33lb Spool

Premium Ferritic Stainless Steel Welding Wire for Industrial Applications

The Exocor ER409Nb 0.035" MIG Welding Wire is a high-performance ferritic stainless steel filler metal designed for precision and durability in demanding industrial environments. Classified as ER409Nb (formerly known as ER409Cb), this wire is specifically engineered to weld Type 409 stainless steels, which are widely utilized in the automotive industry for exhaust systems. The addition of Niobium (Columbium) to the alloy composition plays a critical role in the wire's performance. Niobium acts as a stabilizing element that forms carbides, thereby preventing the formation of chromium carbides at the grain boundaries. This stabilization significantly reduces the risk of intergranular corrosion and sensitization, ensuring the structural integrity of the weld even under high-temperature thermal cycling.

One of the standout features of this Exocor product is its high-quality copper coating. In automated and semi-automatic welding processes, feedability is paramount. The copper coating reduces friction within the liner and at the contact tip, promoting smooth, uninterrupted wire feeding. This results in a stable arc, reduced downtime for maintenance, and extended life for consumables such as contact tips and liners. Furthermore, the coating enhances electrical conductivity, allowing for efficient energy transfer and consistent weld penetration. Operators will appreciate the wide operating range this wire offers, maintaining stability across various parameters while minimizing spatter generation.

This 33lb spool is optimized for industrial production lines and heavy fabrication shops where volume and consistency are key. The wire produces a weld bead with excellent wetting characteristics, resulting in a flat, smooth profile that requires minimal post-weld grinding or finishing. The oxidation darkening of the bead is also reduced, leaving a cleaner finish. For fabricators working on catalytic converters, mufflers, manifolds, and tailpipes, the Exocor ER409Nb provides the metallurgical compatibility and mechanical properties necessary to meet stringent industry standards. It is an essential consumable for any facility specializing in the fabrication or repair of ferritic stainless steel components.

Key Technical Specifications

• Classification: AWS A5.9 ER409Nb / ER409Cb
• Diameter: 0.035 inches
• Spool Weight: 33 lbs (15 kg)
• Microstructure: Ferritic Stainless Steel
• Stabilizer: Niobium (Columbium)