Stainless Steel 409L Coil

409L Automotive Exhaust Coil, suitable for exhaust pipe stamping applications

Its chromium-nickel alloy (Cr 18-20%, Ni 8-10%) endows it with excellent corrosion resistance and an elongation rate of ≥40%, making it suitable for precision processing scenarios such as deep stamping and stretch forming.

  • Exhaust Corrosion Resistance

    Corrosion rate ≤0.05 mm/year in SO₂ and NOx environments

  • Excellent Formability

    Elongation ≥20%, suitable for exhaust pipe stamping

  • Lightweight

    Density 7.7 g/cm³, 3% lighter than 304

Product Specifications

Chemical Composition (GB/T 1220-2007)
Element C ≤ Si ≤ Mn ≤ P ≤ S ≤ Cr Ti
Content % 0.03 1 1 0.045 0.03 10.5–11.75 6*(C+N)–0.75
Physical & Mechanical Properties
  • Density: 7.7 g/cm³

  • Melting Point: 1427–1510 °C

  • Magnetism: Strong magnetic

  • Mechanical Properties: Tensile strength ≥360 MPa, yield strength ≥175 MPa

Specifications & Supply Dimensions
  • Thickness: 0.8–2.0 mm (tolerance ±0.08 mm)

  • Width: 1000 / 1219 mm

  • Surface: 2D (cold-rolled annealed), customizable passivation

  • Coil Weight: 5–10 t/coil, inner diameter Φ508 mm

Pricing Calculation

Workshop & Manufacturing Machine

Coil Feeding into Processing Machine

Parallel Coil Processing Lines

Coil Thickness Measurement

Single Coil Packaging

Factory Coil Storage

Truck Loading of Coils

Product Applications

  • Automotive Exhaust Systems

    Mid-section exhaust pipes (1.2 mm × 1000 mm coil)

  • Industrial Exhaust Pipes

    Boiler flue pipes (1.5 mm × 1219 mm coil)

Additional Information

Welding

Use ER409L welding wire; preheat 100 °C before welding

Stock

Standard 1.0 mm × 1219 mm available; 24-hour delivery

FAQ

What type of stainless steel is 409L coil?

409L is a ferritic stainless steel offering good oxidation resistance and cost efficiency.

What are typical applications of 409L stainless steel coils?

Automotive exhaust systems, structural parts, and industrial components.

How does 409L compare to 430 stainless steel coil?

409L offers better high-temperature performance, while 430 has slightly better corrosion resistance.

Is 409L stainless steel coil weldable?

Yes. It can be welded using standard ferritic stainless steel procedures.

Can 409L coils be customized in width and thickness?

Yes. Coils can be supplied according to specific size requirements.

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