409 Stainless Steel

Overview: 409 Stainless Steel

409 stainless steel is a ferritic stainless steel known for its excellent corrosion resistance, good formability, and high-temperature strength. Composed mainly of chromium, iron, and trace amounts of other elements such as titanium, 409 is often used in applications where oxidation and corrosion resistance are crucial. Its unique combination of properties makes it ideal for use in automotive exhaust systems, heat exchangers, and various other high-temperature environments.

A notable variant, 409L, is a low-carbon version of 409. It offers similar performance with enhanced weldability and reduced risk of intergranular corrosion, making it a popular choice for many applications.

Name 409 Stainless Steel
Stainless Steel Coil, Stainless Steel Sheet, Stainless Steel Plate
ASTM, GB, SUS, etc
Mill Origin
Tisco, Posco, Yongjin, Hongwang, LISCO, etc.
Weight Per Coil
5/10/20MT or customized
Slit Edge/ Mill Edge
No.1, 1D, 2D, BA+PVC, No.4+PVC, Hairline+PVC, 8K/No.8, etc.
Delivery Time
Stock goods 7-15 days, Future goods within 25 days
Package Detail
Standard Sea-Worthy Packing
Free for 409 sample

409 Stainless Steel Features

409 is a heat-resistant ferritic stainless steel that offers excellent oxidation and corrosion resistance compared to carbon steel. Originally developed for automotive exhaust systems, this titanium-stabilized grade has found use in various applications due to its good formability, weldability, and overall corrosion resistance. While the corrosion resistance of Type 409 surpasses that of coated carbon steel and is comparable to Type 410 stainless steel, it is less than that of Type 304/304L stainless steel. Type 409 is not recommended for cosmetic or surface-critical applications as light surface rusting can occur when exposed to atmospheric conditions.

409 is primarily used in automotive exhaust systems due to its excellent heat and corrosion resistance. Its durability and ability to withstand high temperatures make it an ideal material for manufacturing components such as mufflers, catalytic converters, and tailpipes. Beyond the automotive industry, 409 is also used in applications that require moderate corrosion resistance and high-temperature performance, including heat exchangers, furnace liners, and agricultural equipment. Its good formability and weldability expand its utility to various structural and fabrication projects where a cost-effective, corrosion-resistant material is needed.

409 Stainless Steel Application

409 Stainless Steel Tags

Grade 409, Type 409, Inox 409, AISI 409, SUS 409, 1.4512, UNS S40900, Acero 409.

409 Stainless Steel Technical Sheet

409 SS Standards Comparison Sheet


409 SS Chemical Compositions Sheet

Grade Standard C Si Mn P S Ni Cr Ti Nb N

409 SS Properties Sheet

Grade AISI/ASTM Yield Strength Rp0.2(N/mm²) Tensile Strength Rm(N/mm²) Hardness Elongation(%)
≤179 HB

Why Purchase 409 Stainless Steel from GHT

Reliable Inventory Assurance

Ever been in a bind due to an urgent need for substantial quantities of stainless steel coils, only to find your supplier’s inventory lacking? Such situations can disrupt your workflow and plans.

Our Advantage: With us, that scenario is a thing of the past.  Our inventory is consistently stocked to the brim, ensuring rapid fulfillment of even the largest orders, seamlessly aligning with your business timeline.

Varied Inventory Coil Specifications

The quest for stainless steel coils with precise specifications can often lead to dead ends. Finding a supplier who understands and meets these unique requirements is crucial.

Our Advantage: Our inventory is a testament to diversity, encompassing a variety of materials, thicknesses, and widths. We pride ourselves on being able to meet your specific project needs with pinpoint accuracy.

Tailored Stainless Steel Material Processing

You might have encountered situations where custom processing is needed, but finding the right supplier to meet your specific demands can be a challenge.

Our Advantage: Our robust processing capabilities are designed to cater to all your customization needs. Be it dimension adjustments, stainless steel finish surface treatments, or other specific requirements, we offer professional one-stop services.

Precision Shearing Services

Accurate shearing is crucial for the use of stainless steel coils, but not all suppliers can offer such precision services.

Our Advantage: Our shearing services are both professional and efficient, ensuring precise cuts as per your requirements, guaranteeing that the products meet your exact specifications.

Competitive Pricing

When searching for stainless steel coil suppliers, pricing is often a key consideration. You might have had to compromise on your ideal supplier due to high costs.

Our Advantage: Through effective cost control and optimized procurement processes, we ensure competitive pricing. This means choosing us not only gets you high-quality products but also services that offer great value for money.

Looking For 409 Supplier

Send us a message to discuss your 409 needs. We always reply within 24 hours.

How To Pack 409 Stainless Steel Sheet & Coil

In GHT, all of our stainless steel coils are packaged as per international standard to prevent any possible damage or loss. By default, for quantity less than 1 whole compete coil (our MOQ is 5 tons), we will use woven plastic bag to cover SS coils and then fix them upon wooden pallet for further protection. We can also package the SS coils as per your special requirement, though this can incur extra cost.

In GHT, all of our stainless steel sheets are packaged as per international standard to prevent any possible damage or loss. By default, we will use brown paper to cover SS sheets and then bundle them together onto wooden pallets. At times, upon some customers’ requests, we will also apply reinforced package with extra metal straps fixed on the four corners, though this can incur extra cost. For enhanced customer experience, we also accept customized package as per your requests.

409 Stainless Steel FAQs

A: 409 is a ferritic stainless steel commonly used for automotive exhaust systems. It provides good oxidation and corrosion resistance compared to carbon steel and is stabilized with titanium for better performance.

A: Key features of 409 include excellent heat resistance, good corrosion resistance, high formability, and weldability. It is more corrosion-resistant than coated carbon steel and similar to Type 410 stainless steel.

A: 409 is ideal for automotive exhaust systems, including mufflers, catalytic converters, and tailpipes. It is also used in heat exchangers, furnace liners, agricultural equipment, and various structural and fabrication projects requiring moderate corrosion resistance and high-temperature performance.

A: While 409 offers good heat and corrosion resistance, it is less corrosion-resistant than 304 stainless steel. 304 stainless steel is often chosen for more demanding corrosion-resistant applications, whereas 409 is selected for cost-effective solutions in high-temperature environments.

A: 409L is a low-carbon version of 409, providing improved weldability and reduced risk of sensitization and intergranular corrosion. 409L is often preferred for applications where extensive welding is required.

A: 409 is not typically recommended for cosmetic or surface-critical applications, as light surface rusting can form during exposure to atmospheric conditions. It is better suited for functional applications where its mechanical properties are more critical than its appearance.

A: Regular maintenance of 409 involves routine cleaning to prevent surface contamination and potential rust formation. Using mild detergents and avoiding harsh chemicals will help preserve its integrity and appearance.

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