Is 409 stainless good for exhaust pipe?
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If you're wondering if 409 stainless steel tubing is right for your exhaust system, the answer is yes. 409 steel is a ferritic stainless steel containing 10.5–11.7% chromium and a small amount of titanium for stabilization. It offers excellent heat resistance, oxidation stability, and good weldability, making it one of the most widely used materials in automotive and industrial exhaust systems.
Gnee Stainless supplies ASTM A268 / A554 409 stainless steel tubing designed specifically for high-temperature airflow applications. We offer a variety of sizes, wall thicknesses, and finishes. With over 18 years of export experience, Gnee ensures consistent quality, fast delivery, and competitive pricing per kilogram or pound.
Why 409 Stainless Steel is Good for Exhaust Applications
High Heat Resistance: Performs reliably up to 675°C (1247°F), ideal for continuous exposure to hot exhaust gases.
Excellent Oxidation Resistance: Forms a protective chromium oxide film that prevents scaling and surface degradation.
Good Weldability & Formability: Easy to fabricate, weld, and bend into complex exhaust configurations.
Lightweight & Cost-Effective: Offers significant cost savings compared to 304 or 316 stainless steel, while maintaining durability.
Sufficient Corrosion Resistance: Resists mild corrosion and condensate acids found in vehicle exhaust systems.
409 Stainless Steel Exhaust Pipe Price per kg
| Product Type | Outside Diameter (mm) | Wall Thickness (mm) | Finish | Approx. Price (USD/kg) | Standard |
|---|---|---|---|---|---|
| 409 Seamless Exhaust Pipe | 12.7 – 168.3 | 0.8 – 4.0 | Pickled / Annealed | $2.90 – $3.40 / kg | ASTM A268 / A312 |
| 409 Welded Exhaust Pipe | 25.4 – 203.2 | 1.0 – 3.0 | BA / 2B / Mirror | $2.20 – $2.80 / kg | ASTM A554 / EN 10296 |
| 409 Exhaust Elbows / Bends | DN15 – DN100 | - | Polished / Brushed | $3.20 – $3.80 / kg | ASTM A403 |
💡 Contact Gnee for real-time 409 stainless steel pipe prices per kg, per pound, or per meter. Email: info@gneestainless.com
409 Stainless Steel Exhaust Pipe Specification
| Property | Specification |
|---|---|
| Standard | ASTM A268 / A240 / A554 |
| Grade | 409 / 409L / 409Ti |
| UNS Number | S40900 |
| Chemical Composition (%) | C ≤ 0.08, Cr: 10.5–11.7, Ni ≤ 0.5, Ti: ≥ 6×C, Fe: Balance |
| Tensile Strength (MPa) | 380 – 450 |
| Yield Strength (MPa) | ≥ 170 |
| Elongation (%) | ≥ 20 |
| Density | 7.8 g/cm³ |
| Maximum Service Temperature | 675°C (1250°F) |
| Surface Finish | 2B, BA, No.1, Polished, Mirror |
| Pipe Types | Seamless / Welded / ERW |
| Outer Diameter Range | 6mm – 610mm |
| Wall Thickness | 0.5mm – 20mm |
How long do 409 stainless exhaust pipes last?
With proper maintenance, 409 pipes typically last 5–10 years, depending on operating conditions and exposure to moisture or salt.
Why choose Gnee as your 409 stainless steel pipe supplier?
Gnee has over 18 years of experience manufacturing and exporting stainless steel, earning a strong reputation for consistent quality, competitive pricing, and on-time delivery. Our 409 pipes are tested for dimensional accuracy, mechanical strength, and surface finish, ensuring reliable performance in automotive and industrial applications. Email: info@gneestainless.com
Packaging, Delivery, and Payment Methods
Packaging: Plastic cover, waterproof packaging, wooden pallets, or wooden crates.
Delivery Time: 7-15 business days after order confirmation.
Payment: 30% deposit by T/T, 70% deposit before shipment, or L/C at sight.
Ports: Tianjin, Shanghai, Ningbo, Qingdao.
