59249 - Avesta ER409Cb .035" Stainless MIG Wire (15kg Spool)

Premium Ferritic Stainless Steel Wire for Automotive Applications

The Avesta ER409Cb is a high-quality ferritic stainless steel solid wire designed specifically for the Gas Metal Arc Welding (GMAW) of Type 409 and 409Ti base materials. This alloy is stabilized with Niobium (Columbium), which plays a critical role in preventing chromium carbide precipitation and intergranular corrosion, particularly in the heat-affected zone. This stabilization ensures the structural integrity of components subjected to high temperatures and thermal cycling, making it the industry standard for automotive exhaust fabrication.

Manufactured to strict tolerances, this 0.035-inch (0.9mm) diameter wire is precision-wound on a 15kg spool, ensuring consistent feedability in industrial wire feeders. The ER409Cb classification indicates a composition that matches the corrosion resistance and mechanical properties of 409-grade stainless steel sheets and tubing. It offers significantly better oxidation resistance than carbon steel and maintains its strength at elevated temperatures, which is essential for the longevity of catalytic converters, mufflers, manifolds, and tailpipes.

Technical Performance and Metallurgy:

The inclusion of Niobium not only stabilizes the microstructure but also enhances high-temperature creep strength. The weld deposit is ferritic, providing a coefficient of thermal expansion similar to the base metal, which reduces thermal stress during operation. For optimal results, this wire should be used with shielding gas mixtures such as Argon with 2-5% CO2 or Argon with 2% Oxygen. The wire produces a smooth bead with minimal spatter and excellent wetting action, reducing post-weld cleanup time in production environments.

• AWS Classification: A5.9 ER409Cb
• Base Material Compatibility: AISI 409, 409Ti
• Corrosion Resistance: Optimized for exhaust gas environments.
• Weldability: Stable arc with DCEP polarity.