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ASTM A182 F55 Flanges (UNS S32760) - Zeron 100 Super Duplex Supplier in Mumbai
Nicorex Alloys is an ISO 9001 and ISO 14001 certified trusted supplier of Super Duplex F55 flanges in Mumbai, India. We provide these flanges, manufactured in accordance with ASTM A182 standards.
This super duplex grade (Werkstoff 1.4501) typically contains 25% chromium, 7% nickel, 3.5% molybdenum, plus small additions of tungsten, copper, and nitrogen. It offers high strength, with tensile strength around 730-930 MPa and minimum yield strength of 530 MPa (77 ksi). ASTM A182 F55 is a super duplex forging grade uniquely alloyed with both tungsten and copper. These elements improve its performance in acidic environments. Copper strengthens resistance to non-oxidising acids like sulfuric acid, while tungsten helps maintain a protective oxide film for better crevice corrosion resistance in hot, stagnant chlorides. With a PREN above 40 (PREw around 42), it offers very high corrosion resistance. First developed as the Zeron 100 pump alloy for North Sea seawater service, UNS S32760 is now widely used in acid processing, FGD systems, mining, and high-end offshore projects.
ASTM A182 F55 flanges have a balanced 50/50 austenite–ferrite structure for high strength and corrosion resistance. They are available in many types, including weld neck (WNRF), slip-on (SORF), blind (BLRF), socket weld (SWRF), threaded, lap joint, RTJ, spectacle blind, and reducing flanges. Standard sizes cover NPS 1/2″ to 24″ (ASME B16.5) and 26″ to 60″ (ASME B16.47), in pressure classes from 150 to 2500. The material is approved for sour service by NACE MR0175 / ISO 15156, covered by ASME Code Cases 2244-2 and N-564-2 for pressure and nuclear applications.
Super Duplex Steel UNS S32760 Flange Specifications
| Standard | ASTM A182 / ASME SA182 Grade F55 |
|---|---|
| Flange Types | WNRF, SORF, BLRF, SWRF, Threaded, Lap Joint, RTJ, Spectacle Blind, Reducing |
| Size (ASME B16.5) | NPS 1/2” to NPS 24” |
| Size (ASME B16.47) | NPS 26” to NPS 60” |
| Pressure Classes | 150, 300, 400, 600, 900, 1500, 2500 |
| Face Types | RF, FF, RTJ, Tongue & Groove |
Chemical Composition of Super Duplex UNS S32760
hemical composition of ASTM A182 F55 (UNS S32760) Super Duplex Flanges is given in the table below.
| Grade | Cr | Ni | Mo | Cu | W | N | C (max) | Fe |
|---|---|---|---|---|---|---|---|---|
| F55 (S32760) | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.50% to 1.00% | – | 0.20-0.30 | 0.030 | Balance |
Mechanical Properties of Super Duplex Steel UNS S32760 F55 Flanges
| Property | Tensile Strength | Yield 0.2% (min) | Elongation (min) | Hardness (max) | Charpy Impact | Density | Thermal Conductivity |
|---|---|---|---|---|---|---|---|
| Value | 730-930 MPa (106-135 ksi) | 530 MPa (77 ksi); typical 580-620 MPa | 25% | 290 HB | ≥100 J at RT; ≥45 J at -50°C | 7.8 g/cm³ (0.282 lb/in³) | 15 W/m·K at 20°C |
Sub-zero toughness to -50°C qualifies F55 for Arctic and deepwater subsea installations. Max 290 HB (vs F53’s 310 HB) reflects F55’s phase balance.
Equivalent Grades of Super Duplex S32760
| Standard | UNS / Werkstoff | EN |
|---|---|---|
| Designation | S32760 / 1.4501 | X2CrNiMoCuWN25-7-4 |
Get ASTM A182 F55 Super Duplex Flanges at Competitive Prices
Types of ASTM A182 F55 Super Duplex Stainless Steel Flanges
F55 Super Duplex Weld Neck Flange
Zeron 100 Blind Flange
Super Duplex S32760 RTJ Flange
ASTM A182 F55 Slip-On Flange
Super Duplex Steel UNS S32760 Socket Weld Flange
Super Duplex Stainless Steel S32760 Threaded Flanges
Super Duplex Steel F55 Spectacle Blind Flange
ASTM A182 S32760 F55 Lap Joint Flange
SDSS UNS S32760 Reducing Flange
Super Duplex A182 F55 Orifice Flange
UNS S32760 Super Duplex Long Weld Neck Flange
Pressure-Temperature Ratings of Super Duplex F55 Flanges
Super Duplex UNS S32760 flanges (ASTM A182 Grade F55) are rated per ASME B16.5, Material Group 2.8. These flanges carry a maximum service temperature limit of 315°C (600°F) because prolonged exposure above this range risks sigma-phase embrittlement.
| Maximum Allowable Working Pressure — Bar (PSI) | |||||||
|---|---|---|---|---|---|---|---|
| Temp °C (°F) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
| −29 (−20) | 20.0 (290) | 51.7 (750) | 68.9 (1000) | 103.4 (1500) | 155.1 (2250) | 258.6 (3750) | 430.9 (6250) |
| 38 (100) | 20.0 (290) | 51.7 (750) | 68.9 (1000) | 103.4 (1500) | 155.1 (2250) | 258.6 (3750) | 430.9 (6250) |
| 50 (122) | 19.5 (283) | 51.7 (750) | 68.9 (1000) | 103.4 (1500) | 155.1 (2250) | 258.6 (3750) | 430.9 (6250) |
| 100 (212) | 17.7 (257) | 50.7 (735) | 67.6 (980) | 101.3 (1469) | 152.0 (2204) | 253.3 (3673) | 422.2 (6122) |
| 150 (302) | 15.8 (229) | 45.9 (666) | 61.2 (888) | 91.9 (1333) | 137.8 (1999) | 229.6 (3330) | 382.7 (5550) |
| 200 (392) | 13.8 (200) | 42.7 (619) | 56.9 (825) | 85.3 (1237) | 128.0 (1856) | 213.3 (3093) | 355.4 (5154) |
| 250 (482) | 12.1 (175) | 40.5 (587) | 54.0 (783) | 80.9 (1173) | 121.4 (1760) | 202.3 (2934) | 337.2 (4890) |
| 300 (572) | 10.2 (148) | 38.9 (564) | 51.8 (751) | 77.7 (1127) | 116.6 (1691) | 194.3 (2818) | 323.8 (4696) |
Industrial Applications of S32760 Super Duplex Flanges
- Premium Offshore, Subsea, and Sour Gas: Subsea manifold flanges, wellhead Christmas tree connections, choke and kill lines, HP/HT production piping. Selected over F53 when operators specify Zeron 100 or when well stimulation exposes flanges to HCl/H₂SO₄ mixtures.
- FGD and Pollution Control: Scrubber nozzle flanges, absorber tower connections, and slurry recirculation joints. FGD condensation creates dilute H₂SO₄ (pH 1-3) with chloride contamination. F55’s copper handles sulfuric acid, while the super duplex base resists chlorides.
- Acid Leach Mining and Hydrometallurgy: Due to its copper content, F55 offers excellent sulfuric acid resistance, making it a top choice for acid leach piping, solvent extraction circuits, and POX autoclave nozzles.
- Seawater, marine, and defence: F55 flanges provide long-term, reliable service in seawater lift pumps, firewater lines, and naval piping systems.
- Chemical processing, pharmaceutical, and desalination: F55 offers affordable, high-level corrosion resistance for mixed-acid reactors, pharmaceutical process equipment, and chloride-rich desalination pipelines.
How to Order Super Duplex A182 F55 Flanges from Nicorex Alloys
To order F55 Super Duplex Flanges, provide these following important details:
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Grade - ASTM A182 F55 (UNS S32760) - specify if Zeron 100 branded product is required vs generic S32760
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Flange Details - Flange Type, Size, Class, Face
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Quantity & Project Timeline - Quantity and project timeline
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Quantity & Project Timeline - Quantity and project timeline
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Documentation - MTC 3.1, PMI, ASTM A923 (A+B+C), ASTM G48 at 50°C (standard for super duplex), ferrite content, NACE compliance, hardness
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Third-Party Inspection - TÜV, Lloyd's, BV, DNV, SGS
- Special Requirements - ASME code case documentation if nuclear / pressure vessel application
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Testing / Certification Requirements - MTC 3.1, PMI, NACE, TPI
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Dimensional Standard - ASME B16.5, EN 1092-1, DIN, JIS, etc.
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Packaging Requirements - Standard or sea-worthy export packing
- Delivery Destination - Domestic India / International Export