The Lincoln ER409Nb TIG (GTAW) Welding Rod is a ferritic stainless steel GTAW welding rod classified to AWS A5.9/A5.9M ER409Nb. The addition of niobium (columbium) improves corrosion resistance by reacting preferentially with carbon — preventing chromium from forming detrimental carbides at grain boundaries. Lincoln's ER409Nb delivers excellent welding characteristics for Type 409, 409Cb, 439, 430, and other ferritic stainless steels, with standout performance in automotive exhaust, flue, and duct applications.
- Classification: ER409Nb
- Alloy class: Stainless
- Polarity: DCEN
- Positions: All positions
- Available diameters: 1/16", 3/32"
- Process: GTAW
- Classification: ER409Nb
- AWS Classification: AWS A5.9/A5.9M ER409Nb
- ASME: ASME SFA-A5.9 ER409Nb
- Alloy: Ferritic stainless — 11.5% Cr, Nb-stabilized
- Polarity: DCEN (DC straight polarity)
- Shielding gas: 100% Argon
- Process: GTAW (TIG)
- Best results: Low heat input, single-pass or preheat multi-pass
Welding Type 409, 409Ti, 409Cb, 439, and 430 ferritic stainless steels. Ideal for automotive exhaust systems, flues, ducts, and applications subject to moderately high temperatures where ferritic stainless is specified. Lincoln Q2 Lot® certification provides actual wire chemistry and ferrite number for every lot.
- AWS ER409Nb — niobium-stabilized ferritic stainless TIG rod
- Niobium addition prevents sensitization and improves corrosion resistance
- Q2 Lot® certification: actual wire chemistry available online from Lincoln Electric
- Excellent for automotive exhaust, flues, and moderate-temperature stainless applications
- Best results in low heat input, single-pass applications with 100% Argon shielding
- Available in 1/16 in and 3/32 in diameters
| Property | Value |
|---|---|
| Tensile Strength | 67,000 psi |
| Yield Strength | 50,500 psi |
| Elongation | 26% |
| Diameter | Package |
|---|---|
| 1/16" | 1 lb |
| 3/32" | 1 lb |
This Combined Listing parent page aggregates all package sizes and diameters for the Lincoln ER409Nb TIG (GTAW) Welding Rod product family. Use the variant selector or browse individual child listings to find your specific size and packaging configuration.