Flanges play a crucial role in connecting pipes and valves to ensure the smooth functioning of industrial processes. Alloy Steel F91 Flanges are one of the popular flanges widely used in chemical, petrochemical, and oil and gas industries. These flanges are known for their exceptional physical and mechanical properties, making them more durable and dependable than other flanges.
Features of Alloy Steel F91 Flanges
Alloy Steel F91 flanges have several features that make them ideal for various demanding applications. These flanges are made with nickel, chromium, and molybdenum, which offer excellent strength, toughness, and corrosion resistance. The flanges can operate efficiently under high-pressure and high-temperature environments, making them an ideal choice for heavy-duty industries. Moreover, Alloy Steel F91 flanges come in various sizes, shapes, and thicknesses to meet different industrial requirements.
Table Content
Corrosion Resistance of Alloy Steel F91 Flanges
Alloy Steel F91 flanges have a higher resistance to corrosion than regular carbon steel flanges. The addition of chromium and nickel in the flanges improves their corrosion resistance and prevents surface degradation caused by environmental elements and harsh chemicals. Furthermore, these flanges can withstand acidic and alkaline solutions, making them perfect for corrosive environments.
Chemical Composition of Alloy Steel F91 Flanges
The chemical composition of Alloy Steel F91 flanges is crucial as it determines their physical and mechanical properties. These flanges contain a high percentage of nickel, chromium, and molybdenum, offering exceptional strength, toughness, and corrosion resistance. The chemical composition also includes trace amounts of carbon, sulfur, phosphorus, silicon, and manganese, adding strength and durability to the flanges. Moreover, the high-quality raw materials used in manufacturing ensure that the flanges meet international quality standards.
Heat Treatment of Alloy Steel F91 Flanges
Heat treatment is a crucial process in manufacturing Alloy Steel F91 flanges. The heat treatment involves heating and cooling the flanges to achieve the desired physical and mechanical properties. The heat treatment process helps remove the internal stresses from the flanges and improves their toughness, flexibility, and corrosion resistance. The alloy steel F91 flanges undergo various heat treatment processes, such as normalizing, quenching, and tempering, depending on the application and requirements.
Forging or Forming & Machining
Hole Drilling & Surface Treatment
Quality Control & Marking, Identification
Final Inspection and Packaging
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Flange Size Chart | 1/2" (15 NB) to 48" (1200NB), DN10~DN5000 |
| Pressure Rating | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K |
| Flange Connection / Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove, Flange Pipe. |
| Origin | West Europe / Japan / Indian / USA / Korean |
| Types of Flanges | Threaded / Screwed / Forged / Plate |
| Coating | Yellow Transparent, Zinc Plated, Anti-rust Paint, Oil Black Paint, Cold and Hot Dip Galvanized |
| Test Of Flange | Direct-reading Spectrograph, Ultrasonic flaw detector, Magnetic particle detector, X-ray detector, Hydrostatic testing machine. |
| Production technique Used | Heat treated, Forged and Machined |
| Equipment | Press machine, Bending machine, Pushing Machine, Sand-blasting machine, electric bevelling machine etc. |
| Test Certificates | EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc |
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Alloy Steel F91 Slip On Flanges
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Alloy Steel F91 Weld Neck Flanges
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Alloy Steel F91 Blind Flanges
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Alloy Steel F91 Socket weld Flanges
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Chrome Moly F91 Threaded Flanges
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CrMo F91 Lap Joint Flagnes
- Alloy Steel F91 Plate Flanges
- ASME B16.5 CrMo F91 Screwed Flanges
- Grade F91 Alloy Steel SORF Flange
- Chrome Moly F91 BS 10 Table D Flange
- CrMo F91 Flanges
- Alloy Steel F91 Long Weld Neck Flange
- UNS K90901 Flanges
- CrMo F91 Lapped Joint Flanges
- CrMo F91 Spectacle Blind Flange
- Chrome Moly F91 Flanges
- ASME SA182 Alloy Steel F91 Flange
- ASTM A182 Alloy Steel F91 Flange
- CrMo F91 BLRF Flanges
- Alloy Steel F91 Flanges
- Alloy Steel F91 Pipe Flanges
- Alloy Steel F91 Industrial Flanges
- Alloy Steel F91 Flange Price List
- Alloy Steel F91 Flat Face Flange
- Alloy Steel F91 Raised Face Blind Flange
- Alloy Steel F91 Reducing Flanges
- Alloy Steel F91 BS 4504 Flanges
- ANSI B16.36 CrMo F91 Orifice Flange
- Chrome Moly F91 Forged Flange
- Chromium Molybdenum F91 JIS B2220 Flange
- CrMo F91 Slip on Flanges
- Alloy Steel F91 Ring Type Joint Flange
- Alloy Steel F91 RTJ Flange
- Alloy Steel F91 Reducing Flanges
- Chromium Molybdenum Steel F91 Plate Flanges
- CrMo F91 Weld Neck Flanges
- Alloy Steel 1.4903 Flange
- F91 Alloy Steel LWN Flanges
- ASME SA182 Alloy Steel F91 SWRF Flanges
- ANSI B16.5 CrMo F91 WNRF FLange
| STANDARD | WERKSTOFF NR. | UNS | Trade Name |
| AS F91 | 1.4903 | K90901 | 9Cr-1Mo-V |
| Grade | C | Mn | P | s | Si | Ni | Cr | Mo | Cb |
| F91 | 0.08-0.12 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 0.40 | 8.0-9.5 | 0.85-1.05 | 0.06-0.10 |
| Grade | Tensilee Strength (Mpa) | Yield Strength (Mpa) | Elongation % | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| F91 | 415 | 585 | 20 | – | 248 max |
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