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Nial Sheets and Plates stands out as a top manufacturer and supplier of ASTM A182 F91 Circles right in Houston, USA. We cater to the specific needs of critical applications that operate under high temperatures and pressures. Our ASTM A182 F91 alloy steel circles are celebrated for their exceptional strength, durability, and impressive resistance to thermal stress and creep. Crafted from high-grade ferritic alloy steel, these circles are precision-engineered to meet the rigorous standards of industries like power generation, petrochemicals, and refineries. At Nial, we prioritize top-notch quality, precise dimensions, and timely delivery, making us a reliable partner for ASTM A182 F91 Circle needs worldwide.
These ASTM A182 F91 Circles are made up of chromium (8–9.5%), molybdenum (0.85–1.05%), and a base of iron, along with trace amounts of carbon, manganese, silicon, phosphorus, sulfur, vanadium, and nitrogen. This unique blend provides excellent resistance to oxidation and high-temperature creep. The mechanical properties are impressive, featuring a tensile strength of ≥585 MPa, yield strength of ≥415 MPa, and favorable elongation and hardness characteristics, ensuring they hold up well under thermal cycling and pressure stress in critical service conditions.
Specifications ASTM A182 / ASME SA182
Standard ASTM, ASME and API
Range 4 mm to 350 mm dia
Length 1000 mm Long To 6000 mm Long
Finish Bright, Polish & Black
Condition Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
Grade Alloy Steel ASTM A182 F91 Round Bars DIN (1.4903) )
| Grade | C | Cr | Si | S | Mn | P | Mo |
| ASTM A182 F91 | 0.08 – 0.15 | 8.0 – 9.5 | 0.20 – 0.50 | 0.010 max | 0.30 – 0.60 | 0.020 | 0.85 – 1.05 |
| Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 415 | 585 | 20 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Nial Sheets and Plates based in Houston, USA, 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.
ASTM A182 F91 Circles offer several key advantages, including exceptional resistance to high temperatures, oxidation, and corrosion, making them suitable for extreme environments. Their high tensile and yield strength ensure durability and longevity in demanding applications. The addition of chromium and molybdenum provides excellent creep resistance, allowing the material to maintain structural integrity even at elevated temperatures. These circles are ideal for power plants, petrochemical industries, and heavy machinery, offering superior performance and reliability in high-stress environments. Their ability to withstand thermal fatigue and pressure enhances operational efficiency and safety.
Yes, we offer custom sizes for ASTM A182 F91 Circle to meet specific project needs. Our team at Nial Sheets and Plates is dedicated to providing tailored solutions for all your requirements. For more details, contact us at sales@aaronsheetsplates.com.
| STANDARD | UNS | WNR. |
| Alloy Steel ASTM A182 F91 | – | 1.4903 |
You’ll find ASTM A182 F91 Circles primarily used in the fabrication of flanges, valves, heat exchangers, pressure vessels, and piping systems designed for high-temperature services. They’re commonly found in power plants, boilers, and petrochemical facilities, where they excel in elevated temperature and pressure environments. Thanks to their high creep strength and thermal stability, they’re perfect for superheater and reheater tubes, steam pipelines, and turbine components. With outstanding weldability and structural integrity, F91 Circles are the go-to choice for demanding settings that require long-lasting strength and resistance to corrosion.
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