Duplex Steel F51/F53/F60 Flanges are engineered for high-strength and corrosion-resistant piping applications across various industries. Manufactured from premium duplex and super duplex stainless steel grades, these flanges offer excellent resistance to chloride-induced corrosion, stress corrosion cracking, and harsh operating environments. Gopal Forge Industries™ supplies a complete range of Duplex Steel F51/F53/F60 Flanges suitable for offshore, marine, chemical, and petrochemical applications.
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As trusted manufacturers, Gopal Forge Industries™ produces Duplex Steel F51/F53/F60 Flanges using advanced forging techniques and strict quality control processes. These flanges are designed to provide superior mechanical strength and long-term reliability in critical pressure piping systems. Every product undergoes rigorous testing to ensure compliance with international standards and customer specifications.
Among recognized global exporters, Gopal Forge Industries™ supplies Duplex Steel F51/F53/F60 Flanges to customers across Asia, Europe, the Middle East, Africa, and South America. Our export products are manufactured according to ASTM, ASME, ANSI, DIN, and EN standards, ensuring seamless integration into international industrial projects.
As reliable suppliers, we maintain a wide inventory of Duplex Steel F51/F53/F60 Flanges in various sizes, pressure ratings, and flange types. These products are commonly used alongside pipe fittings, buttweld fittings, carbon steel elbow, stainless steel elbow, reducers, tees, and other industrial piping solutions where corrosion resistance and strength are critical.
Being experienced stockists, Gopal Forge Industries™ ensures immediate availability of standard and customized Duplex Steel F51/F53/F60 Flanges. Our ready stock program helps customers reduce procurement lead times while maintaining full material traceability and certification requirements.
Professional manufacturers understand that challenging environments require premium materials. Duplex Steel F51, Super Duplex F53, and Duplex F60 Flanges deliver exceptional resistance against seawater corrosion, pitting, and crevice corrosion. Their superior strength-to-weight ratio also helps reduce system weight while maintaining structural integrity.
Dedicated suppliers focus on delivering more than just products. At Gopal Forge Industries™, our technical team assists customers in selecting the most suitable flange configuration for specific applications. Whether the requirement involves offshore platforms, desalination plants, or chemical processing facilities, we provide dependable flange solutions that meet project expectations.
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Duplex Steel F51/F53/F60 Flanges Specification
| Specification |
Details |
| Product Name |
Duplex Steel F51 / F53 / F60 Flanges |
| Technical Description |
High-strength forged duplex and super duplex stainless steel flanges designed for excellent corrosion resistance, high mechanical strength, and reliable performance in demanding industrial environments. |
| Material Grades |
ASTM A182 F51, ASTM A182 F53, ASTM A182 F60 |
| UNS Designations |
F51 – S31803 / S32205; F53 – S32750; F60 – S32205 |
| Equivalent Grades |
Duplex 2205, Super Duplex 2507, EN 1.4462, EN 1.4410 |
| Available Sizes |
1/2" NB to 48" NB |
| Flange Types |
Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, RTJ, Orifice, Spectacle Blind |
| Standards |
ASME B16.5, ASME B16.47, EN 1092-1, DIN, BS, JIS |
| Pressure Ratings |
Class 150, 300, 400, 600, 900, 1500, 2500 |
| Face Types |
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Dimensions |
Manufactured according to applicable ASME, EN, DIN, BS, and JIS dimensional standards. Dimensions vary according to flange type, nominal size, and pressure class. |
| Manufacturing Process |
Forged, Heat Treated, CNC Machined |
| Surface Finish |
Natural Finish, Pickled, Passivated, Machined |
| Inspection & Testing |
PMI Testing, Hydrostatic Testing, Ultrasonic Testing, Mechanical Testing, Chemical Analysis |
| Certification |
EN 10204 3.1 / 3.2, Material Test Certificate (MTC), NACE MR0175 / ISO 15156 where applicable |
| Applications |
Oil & Gas, Offshore Platforms, Petrochemical Plants, Chemical Processing, Marine, Desalination, Power Plants |
| Manufacturer |
Gopal Forge Industries™ |
Duplex Steel F51/F53/F60 Flanges Chemical Composition
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
N |
| F51 (UNS S31803) |
0.03 |
2.00 |
1.00 |
0.03 |
0.02 |
21.0-23.0 |
4.5-6.5 |
2.5-3.5 |
0.08-0.20 |
| F53 (UNS S32750) |
0.03 |
1.20 |
0.80 |
0.035 |
0.02 |
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.24-0.32 |
| F60 (UNS S32205) |
0.03 |
2.00 |
1.00 |
0.03 |
0.02 |
22.0-23.0 |
4.5-6.5 |
3.0-3.5 |
0.14-0.20 |
Duplex Steel F51/F53/F60 Flanges Mechanical Properties
| Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
Hardness (HB) |
| F51 |
620 Min |
450 Min |
25 Min |
293 Max |
| F53 |
795 Min |
550 Min |
15 Min |
310 Max |
| F60 |
655 Min |
450 Min |
25 Min |
293 Max |
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FAQ's
Duplex Steel F51, F53, and F60 Flanges are forged pipe flanges
manufactured from duplex stainless steel grades that offer high strength,
excellent corrosion resistance, and good resistance to chloride-containing
environments. These flanges are commonly used in demanding piping systems
across oil & gas, petrochemical, marine, and chemical processing industries.
Common types of Duplex Steel F51, F53, and F60 Flanges include:
- Weld Neck Flanges
- Slip-On Flanges
- Blind Flanges
- Socket Weld Flanges
- Threaded Flanges
- Lap Joint Flanges
Duplex Steel F51, F53, and F60 Flanges can be manufactured in standard
ASME B16.5 pressure classes such as 150, 300, 400, 600, 900, 1500,
and 2500, depending on the flange size, material, temperature,
and applicable design requirements. The appropriate pressure class should
be selected according to the piping system's operating conditions.
The commonly supplied duplex stainless steel grades for these flanges include:
- F51 – Duplex stainless steel, commonly associated with UNS S31803
- F53 – Super Duplex stainless steel, commonly associated with UNS S32750
- F60 – Duplex stainless steel, commonly associated with UNS S32205
These grades provide a combination of high mechanical strength and excellent
resistance to corrosion, pitting, and stress corrosion cracking.
Duplex Steel F51/F53/F60 Flanges are widely used in applications
requiring high strength and excellent corrosion resistance, including
oil & gas, petrochemical, chemical processing, marine, offshore,
desalination, pulp & paper, and water treatment industries.
They are particularly suitable for environments exposed to chlorides and
other corrosive media.
Application of Duplex Steel F51/F53/F60 Flanges
Latest Price List of Duplex Steel F51/F53/F60 Flanges
The market price of Duplex Steel F51/F53/F60 Flanges varies depending on flange type, pressure class, dimensions, material grade, quantity requirements, and raw material market trends. Standard Duplex F51 Flanges are generally more economical than Super Duplex F53 variants due to alloy content. For current market rates, bulk pricing, and project quotations, contact Gopal Forge Industries™ directly.
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