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With its main office in Chennai, India, Kunj Sheets and Plates is a reputable producer and supplier of premium stainless steel 309S foils. The company, which is known for its superior engineering, accuracy, and customer service, offers stainless steel solutions that are made to last and withstand high temperatures. Kunj’s stainless steel 309S foils combine exceptional oxidation resistance with ease of fabrication, making them perfect for demanding industrial settings. Serving a variety of industries, such as thermal processing, petrochemicals, power generation, and heat treatment, the company guarantees that its products are delivered reliably and efficiently while meeting international quality standards.
With a low carbon content of roughly 22–24% chromium and 12–15% nickel, stainless steel 309S offers exceptional resistance to oxidation at high temperatures. Weldability is enhanced and the chance of carbide precipitation is decreased due to the lower carbon content. The alloy has an approximate elongation of 40%, a yield strength of 205 MPa, and a tensile strength of 550 MPa. It is perfect for thermal applications because of its austenitic structure, which keeps it ductile and durable at high temperatures. In oxidising and heat-intensive environments, 309S foils maintain mechanical integrity by resisting scaling and deformation.
| Specification | ASTM B 906/ASME SB 906, ASME Code Cases 1827 and N-253, SAE/AMS 5540, BS 3072NA14 and 3073NA14, DIN 17750, ISO 6208, EN 10095, MIL-DTL-23228. |
|---|---|
| Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard |
| standards and approvals |
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| Plasma profiles | As per customer’s drawings |
| Value added services | Laser cutting, Waterjet cutting, Plasma cutting, Bending and mechanical processing, edge preparation, welding, sawing and shearing. |
| VAS |
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| Origin | Indian Origin, European Origin, Japanese Origin |
| Packing | Bundles with waterproof cloth outside or plywood box |
| Test | UT, SGS testing, TUV etc |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| ELEMENT | SS 309S |
| NI | 12.0 – 15.0 |
| C | 0.08 max |
| MN | 2.0 max |
| P | 0.045 max |
| S | 0.030 max |
| SI | 1.0 max |
| CR | 22.0 – 24.0 |
| MO | 0.75 max |
| Condition & Grade | Tensile Strength | Yeild Strength | Elognation | Hardness |
|---|---|---|---|---|
| SS 309S | 75 (515) | 30 (205) | 35 | 90 HRB max |
DIN 1.4833 Foils offer several key advantages, including excellent resistance to high temperatures, making them ideal for applications in extreme heat environments up to 1100°C. The low carbon content improves weldability, minimizing carbide precipitation and enhancing the material’s strength. These foils also provide superior oxidation and corrosion resistance, ensuring long-term durability. Stainless Steel 309S is highly versatile, offering exceptional performance in industries such as aerospace, chemical processing, and furnace applications. Its strength, formability, and resistance to scaling make it a reliable choice for high-temperature and high-stress applications.
| Standard | Werkstoff Nr. | UNS |
| SS 309S | 1.4833 | S30908 |
Applications needing exceptional resistance to heat and oxidation frequently use stainless steel 309S foils. Common applications include heat shields in hot conditions, thermal insulation, and furnace parts. They are utilised in reactor linings, flare stacks, and catalytic converters in the petrochemical and refining sectors. These foils are used for boiler casings, ducting, and exhaust systems in power plants. Additionally, the alloy is used in electrical heating elements, annealing covers, and kiln linings. 309S is perfect for custom-fabricated parts that are subjected to high temperatures, oxidation, and thermal cycling over extended periods of time because of its exceptional formability and weldability.
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