Ferdi Fittings, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of high-quality Alloy Steel F91 Forged Fittings. Known for their precision engineering and strict adherence to international standards, Ferdi Fittings caters to industries that demand durable and reliable piping solutions. Their Alloy Steel F91 forged fittings are crafted to endure extreme temperatures and pressures, making them perfect for applications in power generation, petrochemicals, and refineries. With a strong commitment to excellence, Ferdi Fittings guarantees that each product offers outstanding performance, corrosion resistance, and a long service life, effectively meeting the diverse needs of clients around the globe in challenging industrial settings.
| Specification : | ASTM A182 F91 Forged Fittings |
|---|---|
| Size | Threaded Fittings = ½” – 4” |
| Pressure Rating | Threaded Fittings = Class 2000, Class 3000, Class 6000 |
| Type Of Pipe systems | 45 Deg Elbow, Equal tee, Full Coupling, Reducing Tee, 90 Deg Elbow, Half Coupling, Street Elbow, Bull Plug, Boss, Union (Male/Female), Lateral Outlet, 45 Lateral Tee, Equal Cross, Pipe Cap, Branch Outlets, Swage Nipple. |
| Thread Connections | ASME B16.11 (Socket Welding and Threaded) Fittings, MSS-SP-83 (Class Unions) Fittings, ASME B16.3 (Malleable Iron Fittings) Fittings, ASME B16.4 ( Gray Iron Fittings) Fittings, ASME B16.39 (Malleable Iron Unions) Fittings, ASME B16.34 (Valves — Flanged) Fittings, ASME B16.39 (Malleable Iron Pipe Unions Fittings, 150#, 250#, Or 300#). |
| Standards | ASME B16.11 (American Standard), Bs3799, MSS SP 79, JIS B2302, MSS-SP-97 (Threadolet), MSS-SP-83 (Union), ASME B36.19 (Nipple) |
| Types Of Thread | NPT Fittings, BSPP Fittings, BSPT Fittings, PF Fittings, PT Fittings, MPT Fittings |
| Applications | Oil and Gas Chemical Power station Water Pipeline Noncritical Applications Fire Protection |
| Advantages Of | Simple Usage Easy installation Economic as cheaper |
These Alloy Steel F91 forged fittings are primarily made of iron, with about 9% chromium and 1% molybdenum, along with small amounts of vanadium, niobium, and carbon. This meticulously engineered blend provides remarkable high-temperature strength, creep resistance, and oxidation resistance. The mechanical properties boast a tensile strength of 620–750 MPa, yield strength of 450–550 MPa, and hardness between 200–250 HB. Additionally, these fittings exhibit excellent impact toughness and fatigue resistance, making them suitable for high-stress, high-temperature environments. Precision forging and heat treatment further enhance their dimensional stability and mechanical performance.
| Gr | C | Mn | Si | S | P | Cr | Mo |
| ASTM A182 F91 Forged Fittings | 0.15 | 0.3 – 0.6 | 0.5 | 0.03 | 0.03 | 4 – 6 | 0.044 – 0.65 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| ASTM A182 F91 Forged Fittings | 275 | 485 | 20 |
Ferdi Fittings is a leading supplier of Alloy Steel F91 Forged Fittings in Istanbul, Turkey. We offer an extensive range of Alloy Steel F91 Forged Fittings, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Alloy Steel F91 Forged Fittings from Ferdi Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Alloy Steel F91 Forged Fittings offer numerous advantages, including exceptional strength, making them suitable for high-pressure and high-temperature applications. Their excellent corrosion resistance and thermal stability ensure long-term durability in harsh environments. With superior creep resistance and oxidation protection, they perform reliably in critical industrial systems. These fittings also offer excellent weldability, machinability, and ease of installation. Their resistance to fatigue and wear under extreme conditions ensures minimal maintenance and downtime, making them a preferred choice for industries such as power generation, petrochemical, and aerospace, where performance and safety are paramount.
Yes, custom sizes for Alloy Steel F91 Forged Fittings are available at Ferdi Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@ferdifittings.com.
| STANDARD | UNS | WERKSTOFF NR. | Trade Name |
| ASTM A182 F91 Forged Fittings | K90901 | 1.4903 | 9Cr-1Mo-V |
| DN | NPS | Center to End NPT Elbow, NPT Tee, NPT Cross A | Center to End 45 Deg Elbow C | O.D. of Band H | Min. Wall Thick. G | Length of Thread. Minimum (1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 2000 | Class 3000 | Class 6000 | Class 2000 | Class 3000 | Class 6000 | Class 2000 | Class 3000 | Class 6000 | Class 2000 | Class 3000 | Class 6000 | B | L2 | ||
| 6 | 1/8 | 21 | 21 | 25 | 17 | 17 | 19 | 22 | 22 | 25 | 3.18 | 3.18 | 6.35 | 6.4 | 6.7 |
| 8 | 1/4 | 21 | 25 | 28 | 17 | 19 | 22 | 22 | 25 | 33 | 3.18 | 3.30 | 6.60 | 8.1 | 10.2 |
| 10 | 3/8 | 25 | 28 | 33 | 19 | 22 | 25 | 25 | 33 | 38 | 3.18 | 3.51 | 6.98 | 9.1 | 10.4 |
| 15 | 1/2 | 28 | 33 | 38 | 22 | 25 | 28 | 33 | 38 | 46 | 3.18 | 4.09 | 8.15 | 10.9 | 13.6 |
| 20 | 3/4 | 33 | 38 | 44 | 25 | 28 | 33 | 38 | 46 | 56 | 3.18 | 4.32 | 8.53 | 12.7 | 13.9 |
| 25 | 1 | 38 | 44 | 51 | 28 | 33 | 35 | 46 | 56 | 62 | 3.68 | 4.98 | 9.93 | 14.7 | 17.3 |
| 32 | 1-1/4 | 44 | 51 | 60 | 33 | 35 | 43 | 56 | 62 | 75 | 3.89 | 5.28 | 10.59 | 17.0 | 18.0 |
| 40 | 1-1/2 | 51 | 60 | 64 | 35 | 43 | 44 | 62 | 75 | 84 | 4.01 | 5.56 | 11.07 | 17.8 | 18.4 |
| 50 | 2 | 60 | 64 | 83 | 43 | 44 | 52 | 75 | 86 | 102 | 4.27 | 7.14 | 12.09 | 19.0 | 19.2 |
| 65 | 2-1/2 | 76 | 83 | 95 | 52 | 52 | 64 | 92 | 102 | 121 | 5.61 | 7.65 | 15.29 | 23.6 | 28.9 |
| 85 | 3 | 86 | 95 | 106 | 64 | 64 | 79 | 109 | 121 | 146 | 5.99 | 8.84 | 16.64 | 25.9 | 30.5 |
| 100 | 4 | 106 | 114 | 114 | 79 | 79 | 79 | 146 | 152 | 152 | 6.55 | 11.18 | 18.67 | 27.7 | 33.0 |
| Normal Pipe Size | A | B | QTY | Weight In KG |
|---|---|---|---|---|
| ¼ | 0.81 | 0.88 | 160 | 0.20 |
| ⁄ | 0.97 | 1.00 | 130 | 0.26 |
| ½ | 1.12 | 1.31 | 100 | 0.57 |
| ¾ | 1.31 | 1.5 | 75 | 0.71 |
| 1 | 1.5 | 1.81 | 40 | 1.08 |
| 1 ¼ | 1.75 | 2.19 | 25 | 1.68 |
| 1 ½ | 2.00 | 2.44 | 18 | 2.38 |
| 2 | 2.38 | 2.97 | 10 | 3.55 |
| 2 ½ | 3.00 | 3.62 | 4 | 6.22 |
| 3 | 3.38 | 4.31 | 2 | 10.36 |
| 4 | 4.19 | 5.75 | 1 | 23.91 |
Alloy Steel F91 forged fittings find extensive use in power plants, particularly in steam lines, superheaters, and reheaters, as well as in petrochemical and oil refinery piping systems. They are ideal for high-pressure and high-temperature applications, including both nuclear and thermal power generation. These fittings ensure leak-proof connections, long-term reliability, and resistance to oxidation and thermal fatigue. Their versatility also extends to chemical processing plants, offshore platforms, and other industrial environments that require superior corrosion resistance and mechanical strength, ensuring safety, efficiency, and durability.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.








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