Stainless Steel 309/309S Sheet Plate Coils

Stainless Steel 309S Sheet Plate is a trusted choice for industries that demand exceptional resistance to heat, corrosion, and oxidation. Its low carbon composition, superior weldability, and diverse finishes make it highly adaptable for various applications, from heavy industrial machinery to modern architectural projects. Whether you require cold-rolled stainless steel 309S sheets, hot-rolled 309S plates, or polished mirror finish SS 309S sheets, we deliver quality, durability, and performance that meet international standards.

Stainless Steel 309/309S Sheet, Plate, and Coils are widely recognized for their exceptional high-temperature strength, corrosion resistance, and versatility across multiple industries. These grades are part of the austenitic stainless steel family, designed to provide outstanding resistance to oxidation and superior toughness even at elevated temperatures. Whether used in structural components, chemical processing equipment, or heat-treatment applications, SS 309 and SS 309S offer reliability and long service life.

Overview of Stainless Steel 309 and 309S

Grade 309 is a high-alloy stainless steel known for its outstanding oxidation resistance up to 1000°C. Grade 309S is the low-carbon version, offering improved weldability and reduced risk of carbide precipitation during welding. Both grades deliver excellent strength, toughness, and resistance to scaling in intermittent or continuous exposure to high heat.

Industries that demand durability under extreme environments—such as chemical, petrochemical, power generation, and marine—often choose SS 309/309S Sheet Plate Coils for their dependable performance.

Key Advantages of SS 309/309S Sheets, Plates, and Coils:

• Superior resistance to oxidation and scaling.
• Excellent strength and toughness at elevated temperatures.
• Better weldability and formability (especially 309S).
• Extended service life in challenging environments.
• Compatibility with a wide range of industrial applications.

Available Finishes for Stainless Steel 309/309S Sheet Plate Coils

To meet diverse design and functional needs, SS 309/309S Sheets, Plates, and Coils are available in multiple surface finishes:

• 2B Finish – Smooth, reflective, and easy to clean, making it a preferred finish for industrial and architectural applications.
• BA (Bright Annealed) Finish – Highly reflective and used where aesthetics and hygiene are critical.
• No.1 Finish – Hot rolled, annealed, and pickled finish with a rough surface ideal for high-temperature and structural uses.
• No.4 Finish – Brushed finish that offers a satin-like appearance, often used in decorative and architectural applications.
• Matt Finish – Non-reflective and designed for applications where glare reduction is essential.
• Hairline Finish – Long, continuous polishing lines for an elegant, high-end aesthetic.
• Mirror Finish – Highly polished reflective surface suitable for premium decorative use.

Custom finishes can also be produced upon request to meet specific project requirements.

Applications of Stainless Steel 309/309S Sheet Plate Coils

SS 309/309S Sheets, Plates, and Coils are essential materials across industries due to their high heat resistance, oxidation stability, and robust mechanical properties. Some typical applications include:

• Furnace parts: Mufflers, burner nozzles, heat exchangers, and radiant tubes.
• Petrochemical industry: Equipment exposed to high-temperature gases and liquids.
• Power generation: Boiler casings, superheater tubing, and turbine components.
• Food processing: Heat treatment trays and baskets requiring easy cleaning and resistance to scaling.
• Automotive industry: Exhaust systems and heat shields for performance vehicles.
• Marine applications: Components subjected to saline and corrosive environments.

Construction and architecture: Structural and decorative elements needing both strength and appearance.

Why Choose Stainless Steel 309/309S Sheet Plate Coils?

• High-Temperature Performance:
  The ability to withstand elevated temperatures without losing strength makes SS 309/309S the go-to choice for heat-intensive industries.
• Oxidation Resistance:
  Excellent resistance to oxidation and scaling, even under cyclic heating conditions, ensures long service life.
• Versatility:
  Available in a wide range of thicknesses, widths, and finishes, these products can be customized for virtually any application.
• Weldability and Formability:
  Especially in 309S, the low carbon content allows for easy welding and fabrication, minimizing the risk of sensitization and intergranular corrosion.
• Durability:
  Built to endure harsh environments, SS 309/309S maintains structural integrity over time, reducing maintenance costs.

Supply Conditions and Availability

SS 309/309S Sheet Plate Coils are available in different forms and sizes to cater to global industrial requirements:

• Sheets: Thin flat pieces used in fabrication, cladding, and decorative applications.
• Plates: Thicker sections ideal for structural, high-pressure, and heavy-duty use.
• Coils: Continuous lengths wound into rolls for easier handling, transport, and custom cutting.