409L Stainless Steel Coil and Sheet

409L (UNSS40900, EN1.4512) is a stable version of 409 stainless steel, belonging to the ferritic family. It contains appropriate amounts of chromium, low carbon and nitrogen content, and is alloyed with titanium. These components provide 409L with excellent properties such as corrosion resistance, weldability, and formability. Despite its lower chromium content, 409L is an economical choice for corrosion-resistant stainless steel, primarily used in automotive exhaust systems. It is renowned for its good mechanical properties and exceptional high-temperature corrosion resistance. While not commonly used for decorative purposes, it excels in applications requiring weldability and effective corrosion protection, especially in environments demanding high resistance to gas corrosion.

409L Stainless Steel Coil and Sheet Basic Information

Sanmei Metal Stainless Steel inventory includes grade 409L in coil and sheet.

409L is equivalent to

  • ASTM: 409L
  • AISI: 409L
  • JIS: SUS409L
  • EN: 1.4575
  • DIN: X2CrTi12
  • UNS: S40910

409L Stainless Steel Processing

Corrosion Resistance of 409L Stainless Steel

Similar to 409 but with improved resistance to corrosion in some environments.

Heat Resistance of 409L Stainless Steel

Good oxidation resistance up to 675°C.

Machinability of 409L Stainless Steel

Good weldability with all common methods. Post-weld annealing is recommended.

Welding of 409L Stainless Steel

Good weldability with all common methods. Post-weld annealing is recommended

Hot Working of 409L Stainless Steel

 Heat to 1500°F – 1900°F (816°C – 1038°C). Do not work below 1500°F.

Cold Working of 409L Stainless Steel

Cold working is possible but less formable than 304.

Annealing of 409L Stainless Steel

Anneal at 815°C – 845°C followed by air cooling.

Hardening of 409L Stainless Steel

Cannot be hardened by heat treatment but can be solution-treated or annealed to optimize its properties.

409L  Stainless Steel Mechanical Property and Physical Property

Physical Properties of 409L Stainless Steel
PropertyValueUnit
Density0.279lb/in³
Modulus of Elasticity32.0 x 106psi
Coefficient of Thermal Expansion (68-212°F)6.5 x 10-6/°F
Thermal Conductivity13.2Btu/ft·hr·°F
Specific Heat0.11Btu/lb·°F
Electrical Resistivity24.8Microohm-in

 

409L Stainless Steel Mechanical Property
PropertyYield Strength, min. (ksi)Tensile Strength, min. (ksi)Elongation, min. (%)Hardness, max. (Rb)
409L25552088

409L Stainless Steel Chemical Composition

GradeC (Max)Cr (Max)Ni (Max)Mn (Max)Si (Max)P (Max)S (Max)P (Max)Nb (Max)N (Max)
409L0.0310.5-11.70.5110.0450.020.048 x (C+N) min / 0.15-0.500.03

 

BUY YOUR 409L

Why Choose 409L Stainless Steel?

Excellent High-Temperature and Corrosion Resistance

409L stainless steel demonstrates exceptional performance in automotive exhaust systems, effectively resisting high temperatures and corrosive environments, ensuring the longevity and safety of the exhaust system.

Excellent Weldability

The low-carbon formulation of 409L stainless steel enhances its weldability, making the welding process easier to control and reducing the likelihood of welding defects. This is particularly important in automotive manufacturing.

Lower Cost

Compared to some high-end stainless steel grades, 409L stainless steel is more cost-effective, providing better value for manufacturers and consumers alike.

BUY YOUR 409L

409L vs 409 Stainless Steel

Chemical Composition Differences:
  • 409 stainless steel has a relatively higher carbon content, around 0.08%
  • 409L stainless steel has a relatively lower carbon content, generally less than 0.03%
  • 409L also contains a small amount of nickel, around 0.5%
Performance Differences
  • Due to the low-carbon, high-nickel composition, 409L has slightly better weldability and corrosion resistance compared to 409.
  • However, 409 also has excellent high-temperature resistance and corrosion resistance
Cost Differences:
  • 409 stainless steel is more economical as it does not require the addition of nickel
  • 409L has a slightly higher cost due to the inclusion of nickel
In Summary:
The main difference between the two is that 409L has slightly better weldability and corrosion resistance, but 409 has a lower cost and better price-to-performance ratio.

Sanmei's 409L Stainless Steel Coil and Shhet Specification

For Coil

TypeWidth  (mm)Weight  (MT)Thickness  (mm)
409L Coil1000, 1219, 1240, 1500 or Customized3-100.15-3.0

For Sheets

TypeWidth (mm)Length (mm)Thickness (mm)
409L Sheets1000, 1219, 1240, 1500 or Customized2000, 2438, 2500, 3000, 30480.3-3.0 

Basic Surfaces for Stainless Steel Coils and Sheets

The basic finish options for 201, 304, 304L, 316, 316L, and 430, etc. stainless steel coils and sheets include 2B, BA, No. 1, and No. 4 finishes. Please get in touch with our professional sales team for details on other grades and finishes.

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Plenty of Decorative Finishes for Your Stainless Steel Sheet

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Stainless Steel Coil Surface Treatment

The finished stainless steel coil is a powerful solution to the problems of inconsistent styles and discontinuous colors.
including NO.1, 2B, BA, NO.4, 8K, Hairline, brushed and ect.
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Stianless Steel is an indispensable material across a wide spectrum of industries, from food processing and medical equipment to household goods, construction, and industrial applications.

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  • She is a Trustworthy Friend and Business Partner

    "Mrs.Paige is a long time business partner, supplying me many diversified products, she has the capacity to supply any product namely finished product, raw materials, machinery, spare parts & also packing materials. She always maintains quality, price and punctuality in full filling orders. She is a good friend with whom you could confidently move forward for the betterment of any business. I wish her good luck" 

    Mr. Moeez
    Director
    Start Your Worry-Free Journey
  • I've found her to be one of the most open and passionate people.

    I've worked with Mrs Paige on numerous deals for our respective companies. At the time, I found her to be one of the most open and passionate people. Her dealing is flawless, with great coordination and problem-solving skills. You can always rely on her to come through for you and give you the best support. I can confidently say I gained a good friend and look forward to continued cooperation in the future.

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