What is ASTM A182 F53 material?
ASTM A182 F53 (UNS S32750), often referred to as Super Duplex 2507, is a high-performance forging grade stainless steel combining excellent corrosion resistance with high tensile strength. It is commonly used in, for example, ASME B16.5 F53 Flanges, fittings, and valve bodies designed for harsh, chloride-rich environments like offshore oil and gas and desalination plants.
GNEE supplies ASTM A182 F53 (UNS S32750) Super Duplex Socket Weld Flanges, forged in strict accordance with ASTM A182 and ASME B16.5 standards. The product range covers pressure classes from Class 150 to 2500, with sizes available from DN15 to DN300. Standard stock is available, while non-standard customization, sealing face precision machining, and matching pipe fittings are also supported. With precise dimensional tolerance control, these socket weld flanges are particularly suitable for compact high-pressure piping connection systems.
The PREN (Pitting Resistance Equivalent Number) of UNS S32750 socket weld flanges reaches 40 or higher. Within a working temperature range of -50°C to +300°C, they can effectively resist pitting corrosion, crevice corrosion, and stress corrosion cracking. A flange connection generally consists of three essential components: pipe flanges, fasteners (bolts/nuts), and gaskets. The joint is achieved by placing a gasket between two flanges, ensuring excellent sealing performance. These flanges are widely used in offshore platforms, oil & gas wellheads, and high-pressure pipelines in strongly corrosive chemical processing environments.
In addition, GNEE Stainless Steel also supplies a full range of F53 super duplex steel pipe flanges, including socket weld flanges, lap joint flanges, slip-on flanges, blind flanges, weld neck flanges, threaded flanges, and orifice flanges.
ASTM A182 F53 Super Duplex Socket Weld Flange Specifications
| Parameter | Specification |
|---|---|
| Standards | ASTM A182/A182M, ASME B16.5, ASME B16.47 Series A and B, MSS SP-44, EN 1092-1 |
| Additional Standards | DIN 2527/2631 to 2638 (PN6 to PN400), JIS B2220 (5K to 20K), BS 4504 PN6 to PN250 available on request |
| Grades Covered | F53 (UNS S32750), F55 (UNS S32760) |
| Size Range | DN15 (1/2 inch) to DN1200 (48 inch) |
| Pressure Classes | ASME: 150 to 2500 | DIN: PN6 to PN400 | JIS: 5K to 20K |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Temperature Range | -50 degrees C to +300 degrees C (-58 degrees F to +572 degrees F) |
| PREN Value | 40 or above (superior pitting resistance) |
| Surface Finish | Pickled and Passivated (standard). Electropolished available on request. |
ASTM A182 F53 Super Duplex SS Flange Chemical Composition
| Weight% | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
| Super Duplex F53 | 0.03 max | 1.2 max | 0.035 max | 0.015 max | 0.8 max | 24-26 | 43990 | 43895 | 0.3 | 0.5 max |
ASTM A182 F53 Super Duplex SS Flange Mechanical properties
|
Alloy |
Tensile Strength ksi |
Proof Strength 0.2% ksi (min) |
Elongation (%) (min) |
Elongation (%) (min) |
| Super Duplex F53 Annealed Condition |
110-135 |
80 |
15 |
16 |
ASTM A182 F53 Weld Neck Flanges Size Chart
| Nominal Size (Inches) | Outside Diameter (OD) (mm) | Thickness (mm) | Flange Bore (mm) | Bolt Circle Diameter (BCD) (mm) | Number of Bolt Holes | Bolt Hole Diameter (mm) |
|---|---|---|---|---|---|---|
| 1/2″ | 105 | 9.5 | 23.8 | 76.2 | 4 | 16.5 |
| 1″ | 125 | 10.5 | 34.9 | 92.1 | 4 | 18.5 |
| 2″ | 155 | 12.7 | 48.3 | 114.3 | 4 | 19.5 |
| 3″ | 180 | 14.2 | 73.0 | 139.7 | 4 | 21.0 |
| 4″ | 200 | 16.0 | 97.6 | 152.4 | 4 | 22.5 |
| 6″ | 230 | 18.0 | 146.1 | 190.5 | 8 | 24.0 |
| 8″ | 280 | 20.0 | 198.5 | 241.3 | 8 | 26.5 |
| 10″ | 320 | 22.0 | 254.0 | 292.1 | 8 | 29.0 |
| 12″ | 355 | 24.0 | 304.8 | 342.9 | 8 | 31.5 |
| 16″ | 405 | 26.0 | 400.1 | 406.4 | 12 | 34.0 |
| 18″ | 450 | 28.0 | 457.2 | 457.2 | 12 | 36.0 |
| 20″ | 495 | 30.0 | 508.0 | 482.6 | 12 | 38.0 |
| 24″ | 545 | 32.0 | 610.0 | 533.4 | 12 | 41.0 |
What is the difference between F53 and F55?
ASTM A182 F53 (UNS S32750) and F55 (UNS S32760) are super duplex stainless steels, each possessing a Pitting Resistance Equivalent Number (PREN) greater than 40 and designed specifically for high-strength, highly corrosive environments. The primary distinction between the two lies in their composition: F55 contains tungsten (0.5%–1.0%) and a higher molybdenum content, thereby exhibiting superior corrosion resistance in acidic or chloride-containing media; F53, conversely, is frequently utilized in chemical industry applications where high strength is a critical requirement.
Export Case Study: ASTM A182 F53 Flanges
ASTM A182 F53 Flanges HS Code
| Product Name | Material Grade | Standard | Product Type | HS Code |
|---|---|---|---|---|
| ASTM A182 F53 Flanges | UNS S32750 Super Duplex Stainless Steel | ASTM A182 / ASME B16.5 | Stainless Steel Pipe Flanges | 7307.21 |
| ASTM A182 F53 Socket Weld Flanges | UNS S32750 | ASTM A182 | Socket Weld Pipe Flanges | 7307.21 |
| ASTM A182 F53 Weld Neck Flanges | Super Duplex Steel F53 | ASME B16.5 | Weld Neck Flanges | 7307.21 |
| ASTM A182 F53 Blind Flanges | UNS S32750 | ASTM A182 / ASME B16.5 | Blind Pipe Flanges | 7307.21 |
| ASTM A182 F53 Slip-On Flanges | Super Duplex Stainless Steel | ASTM A182 | Slip-On Pipe Flanges | 7307.21 |
| ASTM A182 F53 Threaded Flanges | UNS S32750 | ASTM A182 | Threaded Pipe Flanges | 7307.21 |
| ASTM A182 F53 Lap Joint Flanges | Super Duplex F53 | ASME B16.5 | Lap Joint Flanges | 7307.21 |
| ASTM A182 F53 Orifice Flanges | UNS S32750 | ASTM A182 | Orifice Pipe Flanges | 7307.21 |
You can check the specific customs duties applicable in your country based on the customs code.
If you have project-specific requirements for 2507 stainless steel flanges, we welcome your orders. GNEE maintains a substantial inventory of our best-selling products for you to choose from. Please contact our factory immediately. We offer competitive pricing and exceptional service.
ASTM A182 F53 Super Duplex Socket Weld Flanges are packed with strict export protection standards to ensure product quality during long-distance transportation. Each flange is individually wrapped with anti-rust film and protected by plastic caps on sealing faces. Products are then packed in fumigation-free wooden cases with reinforced steel straps. The packaging damage rate is controlled below 0.3%, while moisture-proof and impact-resistant protection ensures safe delivery for offshore, chemical, and high-pressure pipeline projects.
