Chetak Steel, based in Hyderabad, has built a solid reputation as a reliable manufacturer and supplier of top-notch Alloy Steel Grade 91 Coils. Known for their precision, high-temperature strength, and dependability, they cater to various industries, including power generation, petrochemicals, and heavy engineering. With cutting-edge manufacturing facilities and rigorous quality control measures, Chetak Steel guarantees that each Alloy Steel Grade 91 Coil adheres to international standards and meets customer requirements. These coils are specifically engineered for applications that demand outstanding creep strength, thermal stability, and resistance to oxidation. Chetak Steel’s commitment to performance, durability, and prompt delivery has made them a go-to partner for high-performance industrial needs.
Alloy Steel Grade 91 Coils are crafted from high-chromium, molybdenum steels with a carefully controlled carbon content, making them perfect for high-temperature applications. Typically, they contain around 9% chromium and 1% molybdenum, along with trace amounts of vanadium, niobium, and nitrogen. Mechanically, these coils boast impressive tensile and yield strength, exceptional creep resistance, and remarkable toughness even at elevated temperatures. They also offer good oxidation and corrosion resistance, as well as excellent weldability and formability. These characteristics make Alloy Steel Grade 91 Coils the ideal choice for critical components that face prolonged high temperatures and significant stress.
| Specifications | ASTM A387 / ASME SA387 |
| Standard | ASTM, ASME and API |
| Thickness | 4.0mm – 100mm |
| Specialize | Shim Sheet, Perforated Sheet, B. Q. Profile. |
| Form | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) |
| Finish | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
| Grade | ASTM A387 GR.91 |
| Grade | C | Ni | Mn | S | V | Al | Si | Nb | Cr | Mo | Nitrogen | P |
| A387 GR.91Â | 0.06-0.15 max | 0.43 max | 0.25-0.66 max | 0.012 max | 0.16-0.27 max | 0.05 max | 0.18-0.56 max | 0.05-0.11 max | 7.90-9.60 max | 0.80-2.10 max | 0.025-0.080 max | 0.025 max |
| Grade | A387 GR.91 CL.2 | |||
| A387 GR.91Â | Thickness mm | Yield Min Mpa | Tensile Mpa | Elongation Min % |
| t≦50 | 415 | 585-760 | 18 | |
| 50<t≦200 | – | – | – | |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chetak Steel based in Hyderabad, India is a trusted manufacturer and supplier for Alloy Steel Grade 91 Coils of great quality. In fact, we have earned our reputation for providing a variety of top-notch steel products-such as Structural Steel, Alloy Steel, Carbon Steel, Mild Steel, and Galvanized Steel-with emphasis on Structural Steel Sheets and Plates. Basic product lines include a complete range of Pipes, Tubes, Flanges, Forged Fittings, Bars, and other forms. Chetak Steel is committed to its delivery and customer service, thus ensuring that they procure the best raw materials to guarantee high strength and durability with performance specifically for critical industrial applications. Contact us anytime for your Structural Steel Sheet and Plate needs!
Alloy Steel Grade 91 Coils are a go-to choice in industries that demand high performance at elevated temperatures and strong resistance to creep. In the power generation sector, you’ll find them in boiler tubes, as well as in components like superheaters and reheaters, not to mention heat exchangers. The petrochemical and chemical industries rely on these coils for high-temperature piping, pressure vessels, and reactors. They’re also essential in industrial furnaces, thermal power plants, and heavy engineering projects where thermal stability, oxidation resistance, and mechanical strength are non-negotiable. Thanks to their outstanding durability at high temperatures and robust structural integrity, these coils are perfect for long-term use in extreme conditions, ensuring safety, reliability, and operational efficiency.
Chetak Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hyderabad, India.
Copyright 2025 Chetak Steel. All rights reserved
