409L Ti-Stabilized Ferritic Stainless Steel Coil – Automotive Exhaust Grade
Product Overview
409L is the industry-standard exhaust grade from the 400 series ferritic stainless steel family. Ultra-low carbon and titanium-stabilized, it delivers excellent high-temperature oxidation resistance, reliable weldability and good formability specifically engineered for automotive exhaust applications. This grade provides significantly longer service life than aluminized steel at a moderate cost premium, making it the preferred material for durable exhaust systems and emission control components.
Why Choose CNB 409L Exhaust Stainless Steel?
Our 409L stainless steel is sourced from specialized automotive exhaust steel mills with strict control over titanium content, intergranular corrosion resistance and high-temperature performance. Every coil undergoes weldability verification and high-temperature aging testing to ensure reliable exhaust system performance. We offer both full-width coils and precision-slit strips optimized for tube mill production, with tight dimensional control for consistent welding quality.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | 409L Automotive Exhaust Stainless Steel Coil |
| Steel Grade | 409L Ti-stabilized ferritic stainless steel |
| Product Form | Coil / precision slit strip / welded tube |
| Thickness Range | 0.8mm – 3.0mm |
| Width Range | 100mm – 1250mm |
| Surface Finish | 2B, bright annealed |
| Stabilizing Element | Titanium (Ti) |
| Maximum Carbon | ≤0.03% |
| Applicable Standards | ASTM A240, JIS G4305, automotive exhaust standards |
| Continuous Service Temp | Up to 650°C |
Core Advantages
- Exhaust-optimized: Formulated specifically for automotive exhaust and high-temperature service.
- Excellent weld integrity: Ti-stabilized for corrosion-resistant weld joints.
- Long service life: 2–3x durability vs. aluminized steel exhaust systems.
- Tube-mill ready: Precision slit strips for direct tube production.
- Cost-effective performance: Premium durability at a fraction of 304 stainless cost.
Applications
This 409L stainless steel is widely used for exhaust pipes, muffler shells, catalytic converter housings, resonator tubes, exhaust manifolds and automotive emission control components.
Get a Quotation
We supply automotive exhaust stainless steel in coil, strip and welded tube forms in 409L, 436L and other exhaust grades. High-temperature test reports and weldability verification are available upon request. Contact our automotive stainless team for a detailed quotation.
