For high-temperature structural applications, Kunj Sheets and Plates, a reputable manufacturer and supplier in Chennai, India, provides premium stainless steel 309H angles. Kunj offers 309H angles that satisfy international standards with an emphasis on exceptional durability, accurate engineering, and industry-grade finishing. These angles are frequently utilised in thermal processing and structural supports in harsh environments because of their exceptional mechanical strength and high heat resistance. Kunj Sheets and Plates is a trustworthy supplier of stainless steel solutions meeting the needs of the petrochemical, power, and construction industries with a dedication to client satisfaction and prompt delivery.
The austenitic, heat-resistant alloy known as stainless steel 309H is made up of 0.04–0.10% carbon, 12–15% nickel, and 23–25% chromium. Its creep resistance and high-temperature strength are enhanced by the increased carbon content. Its elongation is 40%, its yield strength is roughly 205 MPa, and its tensile strength ranges from 550 to 750 MPa. Additionally, 309H provides outstanding resistance to oxidation in conditions as high as 1100°C. The alloy is appropriate for heavy-duty structural components exposed to high heat because it is easily weldable and retains structural integrity under thermal cycling conditions.
Specifications : ASTM A276, ASTM A479 / ASME SA276, ASME SA479
Angle Size Range : 20 x 20 mm to 100 x 100 mm
Angles Thickness : 3 to 12 mm (depending on size)
Channel Size Range : Base: 80 to 150 mm; Side: 40 to 75 mm
Channel Thickness : 5 to 6 mm (depending on size)
Length : 3MTR, 4MTR, 5MTR, 6MTR, or Custom Cut Sizes
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 309 | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 20.0 | 10.5 | – | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 309 | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % | 92 | 201 |
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 309 | S30900 | – | – | 1.4828 | – | – | – |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Kunj Sheets and Plates based in Chennai, India, is a leading supplier and stockist of high-quality metal products, including Sheets, Plates, Coils, Foils, Angles, Channels, Circles, and Slitting Coils, all offered with exceptional service and tailored to meet our customers specific requirements. With a focus on delivering superior products, we cater to a wide range of industries, providing reliable solutions for diverse applications. Our extensive inventory includes Known for our unique finishing techniques and commitment to quality. We are dedicated to ensuring customer satisfaction through dependable service and top-notch products.
The stainless steel 309H angle provides excellent high heat resistance, making it ideal for hot environments. The high chromium and nickel content provides outstanding oxidation and corrosion resistance, as well as durability under extreme conditions. High carbon content increases its creep strength, making it suitable for long-term exposure to high temperatures. It exhibits excellent weldability and formability, making it easy to manufacture for structural applications. Furthermore, its strong mechanical properties and resistance to heater fatigue make it reliable for industries such as power generation, chemical processing and manufacturing, ensuring longevity and it works well.
Because of their exceptional resistance to oxidation and high temperatures, stainless steel 309H Angles are frequently used in heat exchangers, boiler baffles, kiln linings and furnace parts. They provide structural support for piping frameworks and high-heat systems in the petrochemical and refining industries. For components subjected to frequent thermal cycling, these angles are also utilised in steel plants, thermal oxidisers, and waste incinerators. They are appropriate for reactor linings, burners, and industrial ovens due to their great strength and resistance to scaling. For structural applications needing high temperature performance, 309H angles offer a dependable, long-lasting solution.
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