Looking for high-quality 409 stainless steel exhaust pipes that deliver exceptional durability and performance? GNEE's 409 stainless steel exhaust pipes are engineered to withstand extreme temperatures, resist corrosion, and provide long-lasting reliability for automotive, industrial, and marine applications.
GNEE's 409 stainless steel exhaust pipes are a cost-effective, durable solution, crafted from a ferritic alloy composed of approximately 90% iron and 10.5–11.75% chromium. With excellent heat resistance and moderate corrosion resistance, these pipes are magnetic and more affordable than 304 stainless steel. Widely used in the automotive industry's exhaust systems, they may not be fully rust-proof but outperform low-carbon steel in corrosion resistance. Thanks to their higher iron content, they exhibit strong magnetic properties, are easy to form and join, and are ideal for exhaust systems and heat exchangers
409 Stainless Steel Pipes for Exhaust Specification
| Item | Description |
|---|---|
| Material Grade | AISI 409 / EN 1.4512 / UNS S40900 |
| Type | Ferritic Stainless Steel |
| Standards | ASTM A268 / A240 / JIS SUH409 / DIN X2CrTi12 |
| Manufacturing Process | Welded or Seamless |
| Form | Round Pipes / Tubes for Exhaust Systems |
409 stainless steel tubing tolerance
| OD in mm | 4 to 35 | 35 to 38 | 38 to 60 | 60 and above |
|---|---|---|---|---|
| Tolerance | +/- 0.08 | +/- 0.15 | +/- 0.20 | +/- 0.25 |
409 Stainless Steel Exhaust Pipe Chemical Composition
| Element | Composition (%) |
|---|---|
| Cr | 10.5 – 11.7 |
| Ni | ≤ 0.5 |
| C | ≤ 0.08 |
| Mn | ≤ 1.0 |
| Si | ≤ 1.0 |
| P | ≤ 0.045 |
| S | ≤ 0.045 |
| Ti | 6xC – 0.75 |
| Fe | Balance |
409 Stainless Steel Round Pipe Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 380 – 550 MPa |
| Yield Strength (0.2% offset) | 170 – 240 MPa |
| Elongation (in 50mm) | ≥ 20% |
| Hardness (Rockwell B) | 70 – 85 HRB |
| Impact Strength | ≥ 27 J |
409 Stainless Steel welded Pipe Physical Properties
| Property | Value |
|---|---|
| Density | 7.75 g/cm³ |
| Melting Point | 1425 – 1510°C (2597 – 2750°F) |
| Thermal Conductivity | 24.9 W/m·K |
| Electrical Resistivity | 0.60 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Thermal Expansion Coefficient (20-100°C) | 11.2 x 10⁻⁶ /°C |
409 Stainless Steel Exhaust Pipe Applications
Our 409 stainless steel exhaust pipes are widely used in:
Automotive exhaust systems
Industrial machinery
Marine exhaust systems
Agricultural equipment
What is the difference between 304 and 409 stainless steel exhaust?
The main differences are that 304 stainless steel has superior corrosion resistance and a more attractive, long-lasting appearance due to its higher chromium and nickel content, while 409 stainless steel is less expensive and more common in factory exhaust systems because it provides adequate heat and corrosion resistance at a lower cost. 304 is better for harsh climates, while 409 is a practical choice for moderate climates, though it may develop surface rust over time.
Our 409 stainless steel exhaust pipes are in stock and available for sale at competitive prices. As trusted stainless steel suppliers and manufacturers, we ensure every product meets the highest quality standards.
Contact us today to request a quote or learn more about our 409 stainless steel exhaust pipes!Mail:es@gescosteel.com
Packaging and Marking:
Packaged in bales or laminated wooden crates, wrapped in plastic, and appropriately protected to ensure seaworthiness for transport or as required.
Marking should comply with Specification A1016/A1016M. Marking should include information on whether the pipe is hot-finished or cold-finished, including but not limited to: standard, grade, size, heat number, and batch number.
