309 Stainless Steel

Overview: 309 Stainless Steel

309 stainless steel is an austenitic stainless steel known for its excellent high-temperature oxidation resistance and superior corrosion resistance. It is composed primarily of chromium and nickel, which provide its distinctive characteristics. This alloy is often used in applications requiring high heat resistance, such as furnace components, heat exchangers, and various high-temperature industrial processes. Additionally, 309 is noted for its good strength and formability, making it a versatile choice for both structural and decorative applications.

309S stainless steel is more commonly produced in China. It features good corrosion and high-temperature resistance, capable of withstanding temperatures up to 980°C. It is primarily used in industries such as boiler manufacturing and chemical processing. Compared to 309, 309S does not contain sulfur (S), which enhances its resistance properties.

Name 309 Stainless Steel
Stainless Steel Coil, Stainless Steel Sheet, Stainless Steel Plate
ASTM, GB, SUS, etc
Mill Origin
Tisco, Posco, 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
Please contact us to request

309 Stainless Steel Features

Grade 309 is known for its exceptional heat resistance, making it a preferred choice for high-temperature applications. It maintains good strength at both room and elevated temperatures, capable of withstanding repeated heating up to 980°C. Thanks to its high chromium and nickel content, 309 offers excellent corrosion and oxidation resistance. This alloy also demonstrates superior resistance to various chemicals, including sulfite liquors, nitric-sulfuric acid mixtures, nitric acid, lactic acid, acetic acid, and citric acid. The most common applications for 309 are in furnace components and other high-temperature industrial environments.

  • Heat Treatment Equipment
  • Petrochemical Equipment
  • Welding Equipment
  • Food and Beverage Industry
  • Environmental Equipment

309 Stainless Steel Application

309 Stainless Steel Technical Datasheet


309 Stainless Steel Compositions

Grade Standard C Si Mn P S Cr Ni

309 SS Properties of Mechanical

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

Why Purchase 309 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 SS309 Supplier

Send us a message to discuss your 309 needs. We always reply within 24 hours.

How To Pack 309 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.

309 Stainless Steel FAQs

309 is an austenitic stainless steel known for its high heat resistance and corrosion resistance. It is often used in high-temperature applications such as furnaces and heat exchangers.

The key properties of 309 include excellent resistance to oxidation and high-temperature environments, good corrosion resistance, and the ability to maintain strength at elevated temperatures.

309 has a higher chromium and nickel content compared to 304 stainless steel, which enhances its ability to withstand higher temperatures and provides better oxidation resistance. This makes 309 more suitable for high-temperature applications.

Common applications of 309 include furnace parts, heat exchangers, boiler baffles, jet engine parts, and other high-temperature industrial equipment.

Yes, 309 can be welded using common welding techniques such as TIG, MIG, and resistance welding. It is advisable to use matching filler metals to maintain the corrosion resistance and mechanical properties of the weld.

309 performs well in both oxidizing and reducing environments. It has good resistance to sulfuric acid, nitric acid, and other corrosive chemicals, making it versatile for various industrial applications.

309 can be used in temperatures up to 1038°C in continuous service and up to 980°C in intermittent service, making it ideal for high-temperature environments.

You can purchase high-quality 309 from GHT Steel. We offer various forms, including sheets, plates, and coils, to meet your specific requirements. Contact us for more information and to place an order.

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