Alloy Steel F91 forged fittings are top-notch components crafted for high-pressure and high-temperature piping systems. Made from ASTM A182 Grade F91 alloy steel, these fittings boast remarkable strength, creep resistance, and durability, even in the toughest conditions. They’re commonly found in industries like power generation, petrochemical, oil & gas, and refineries. You can find F91 forged fittings in various forms, including elbows, tees, couplings, unions, bushings, and caps. Thanks to their forged design, they offer a superior grain structure and mechanical integrity, making them perfect for critical systems where safety and long-lasting performance are a must.
When it comes to their chemical makeup, Alloy Steel F91 features chromium (8–9.5%), molybdenum (0.85–1.05%), and vanadium (0.18–0.25%), along with carbon (0.08–0.12%) and manganese. This unique blend provides excellent oxidation and corrosion resistance at high temperatures. To boost their mechanical properties, F91 forged fittings undergo heat treatment through normalizing and tempering, resulting in impressive tensile strength, outstanding toughness, and good weldability. Typical mechanical values include a minimum tensile strength of 585 MPa and a minimum yield strength of 415 MPa. These characteristics enable the fittings to handle thermal cycling and internal pressures in demanding environments.
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.
Primarily, Alloy Steel F91 forged fittings are utilized in high-temperature, high-pressure piping systems, particularly in superheater and reheater lines of power plants, steam systems, and critical refinery operations. They cater to Class 3000, 6000, and 9000 pressure ratings, depending on the specific design and application needs. These fittings guarantee leak-proof connections and a long service life, even in harsh conditions where standard carbon steel fittings might struggle.
Filiz 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 Istanbul, Turkey.
Copyright 2025 Filiz Steel. All rights reserved
