Thabiso Steel is a reputable manufacturer and supplier located in Cape Town, South Africa, focusing on high-performance steel products, such as Alloy Steel Grade 91 Coil. With a strong dedication to quality, precision engineering, and customer satisfaction, Thabiso Steel caters to a variety of industries throughout South Africa and beyond. The company boasts a comprehensive inventory of alloy steel solutions tailored to meet the rigorous demands of modern infrastructure, power plants, and heavy machinery. Backed by years of experience and a solid reputation for reliability, Thabiso Steel guarantees timely delivery and top-notch material standards with every Alloy Steel Grade 91 Coil they provide.
Alloy Steel Grade 91 Coil is a high-strength, creep-resistant alloy primarily made up of chromium (8–9.5%), molybdenum (0.85–1.05%), along with trace amounts of carbon, manganese, vanadium, and nitrogen. It’s specifically engineered for high-temperature applications, offering outstanding oxidation and corrosion resistance. Its mechanical properties include a tensile strength of about 585 MPa and a yield strength of around 415 MPa, along with impressive toughness even at elevated temperatures. The alloy undergoes heat treatment to enhance its strength and stability, making it perfect for critical components in challenging thermal and pressure environments.
| 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.91 | 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.91 | 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.
Jaxon Steel based in Cape Town, South Africa 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. Jaxon 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!
This Alloy Steel Grade 91 Coil is extensively utilized in high-temperature and high-pressure settings due to its remarkable mechanical properties and resistance to thermal fatigue. It’s commonly found in the power generation sector for crafting boiler tubes, superheaters, reheaters, and headers in both thermal and nuclear plants. The alloy’s durability also makes it a great fit for components in petrochemical refineries, heat exchangers, and pressure vessels. Its ability to retain strength under extreme conditions ensures safety and longevity in essential systems. Thabiso Steel provides this coil to clients who need dependable, high-performance materials for infrastructure and industrial operations across various sectors.
ThabisoSteel 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 Cape Town, South Africa.
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