Luke Steel supplies high-quality Alloy Steel F91 Forged Fittings in Houston, Houstan, designed for extremely high-pressure and high-temperature environments. These fittings are preferred for their strong creep resistance and oxidation resistance in thermal power stations and high-efficiency fossil fuel plants. The chemical structure of Alloy Steel F91 supports long-term exposure to intense thermal loads without losing performance. Luke Steel offers a complete range of socket weld and threaded forged fittings that comply with international codes, ensuring safe, durable, and effective joints in piping systems where heat resistance and mechanical durability are crucial for smooth operation.
F91 Forged Fittings contain 9% chromium, 1% molybdenum, and a small amount of vanadium, providing outstanding strength and thermal resistance. These fittings typically have a tensile strength of 620 to 850 MPa, a yield strength of around 485 MPa, and 18 to 22% elongation. They maintain integrity at temperatures up to 650°C. Their normalized and tempered structure ensures good creep resistance, dimensional stability, and a long service life under continuous stress. F91 also shows good weldability and low thermal expansion, making it ideal for parts in high-efficiency piping systems that face pressure fluctuations and thermal cycling.
Designation : ASTM / ASME A182 GR F91 |
Dimensions : ASME 16.11, MSS SP-79,83,95,97,BS 3799 |
Range : 1/8” – 4” (DN6-DN100) |
Types : Socket Weld Fittings, Screwed-Threaded Fittings |
Class : 2000LBS, 3000LBS, 6000LBS |
Form : Elbow 45 Deg & 90 Deg, Tee, Cross, Cap, Full Coupling, Half Coupling, Union, Bushing, Swage Nipple, Plug |
| Grade | C | Mn | Si | S | P | Cr | Mo |
| A182 F91 | 0.08 – 0.12 | 0.3 – 0.6 | 0.5 | 0.01 | 0.02 | 8.5 – 9.5 | 0.85 – 1.05 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A182 F91 | 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.
Alloy Steel F91 Forged Fittings find use in high-pressure steam lines, boilers, and nuclear and thermal power generation equipment. They are ideal for turbine casings, header systems, and superheaters, where extreme temperatures and stress are common. In petrochemical plants and refineries, F91 is employed in critical pressure piping and reactor systems. The forged fittings, available in various shapes, provide high structural strength and ensure leak-proof, corrosion-resistant pipe joints. Luke Steel delivers F91 fittings per ASTM A182 and ASME standards, ensuring compatibility with modern infrastructure and exceptional performance in the most challenging operating environments.
Luke 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 Houstan, USA.
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