{"product_id":"lincoln-er409nb-tig-gtaw-welding-rod","title":"Lincoln ER409Nb TIG (GTAW) Welding Rod","description":"\u003c!-- PER-186 follow-on parent body — auto-rendered 2026-05-26 --\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eLincoln ER409Nb TIG (GTAW) Welding Rod\u003c\/strong\u003e is a ferritic stainless steel GTAW welding rod classified to \u003cstrong\u003eAWS A5.9\/A5.9M ER409Nb\u003c\/strong\u003e. 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.\u003c\/p\u003e\n\n\u003cdiv class=\"per161-tldr\"\u003e\n  \u003ch2\u003eKey takeaways\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClassification:\u003c\/strong\u003e ER409Nb\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAlloy class:\u003c\/strong\u003e Stainless\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e DCEN\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePositions:\u003c\/strong\u003e All positions\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable diameters:\u003c\/strong\u003e 1\/16\", 3\/32\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProcess:\u003c\/strong\u003e GTAW\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eClassification: \u003cstrong\u003eER409Nb\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eAWS Classification: \u003cstrong\u003eAWS A5.9\/A5.9M ER409Nb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eASME: ASME SFA-A5.9 ER409Nb\u003c\/li\u003e\n\u003cli\u003eAlloy: Ferritic stainless — 11.5% Cr, Nb-stabilized\u003c\/li\u003e\n\u003cli\u003ePolarity: DCEN (DC straight polarity)\u003c\/li\u003e\n\u003cli\u003eShielding gas: 100% Argon\u003c\/li\u003e\n\u003cli\u003eProcess: GTAW (TIG)\u003c\/li\u003e\n\u003cli\u003eBest results: Low heat input, single-pass or preheat multi-pass\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eWelding 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.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAWS ER409Nb\u003c\/strong\u003e — niobium-stabilized ferritic stainless TIG rod\u003c\/li\u003e\n    \u003cli\u003eNiobium addition prevents sensitization and improves corrosion resistance\u003c\/li\u003e\n    \u003cli\u003eQ2 Lot® certification: actual wire chemistry available online from Lincoln Electric\u003c\/li\u003e\n    \u003cli\u003eExcellent for automotive exhaust, flues, and moderate-temperature stainless applications\u003c\/li\u003e\n    \u003cli\u003eBest results in low heat input, single-pass applications with 100% Argon shielding\u003c\/li\u003e\n    \u003cli\u003eAvailable in 1\/16 in and 3\/32 in diameters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMechanical Properties (Typical — As-Welded)\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e67,000 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYield Strength\u003c\/td\u003e\n\u003ctd\u003e50,500 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation\u003c\/td\u003e\n\u003ctd\u003e26%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eAvailable Diameters \u0026amp; Package Sizes\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003ePackage\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/16\"\u003c\/td\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eProduct Family (Combined Listing)\u003c\/h2\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n","brand":"Lincoln Electric","offers":[{"title":"1\/16 in · 10 lb Tube","offer_id":43639142023319,"sku":"ED035242","price":152.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-er409nb-lincoln-tig-gtaw-welding-rod-116-10lb-tube-lincoln-electric-1.jpg?v=1746604517","url":"https:\/\/weldingmart.com\/products\/lincoln-er409nb-tig-gtaw-welding-rod","provider":"WeldingMart.com","version":"1.0","type":"link"}