Nguyen Fittings and Plates is a well-established manufacturer and exporter of Duplex Steel UNS S31803 Buttweld Fittings, located in Da Nang, Vietnam. The organization specializes in making high-quality buttweld fittings with excellent mechanical strength and superior corrosion resistance. Through state-of-the-art forging and fabrication processes, Nguyen Fittings and Plates provides products that are up to international standards, serving industries like oil and gas, chemical processing, marine, and power generation. Their Duplex Steel UNS S31803 Buttweld Fittings are engineered for reliability and durability in extreme conditions, offering long-lasting performance in mission-critical piping systems globally.
| Standards | ASTM, ASME |
| Designation | A815, SA815 |
| Dimension Standard | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Grade | Duplex Steel S31803 Buttweld Pipe Fittings. |
| Type | Seamless, Welded |
| Thickness | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
| Size | 1/2″ to 24″ |
| Two Joint / Two Halve S31803 Butt weld Fittings Size | 6″ to 48″ |
| Types of Butt weld Fittings | Equal Tee, Nipple, Long Radius Elbow, Reducing Tee, Elbows, Swage Nipple, Short Radius Elbow, Reducer, Barrel Nipple, 90 Deg Elbow, Concentric Reducer, Reducing Nipple, 45 Deg Elbows, Eccentric Reducer, Bend, 180 Deg Elbow, End Cap, 1D Elbow, 3D Elbow, Stubend, 5D Elbow, Cap, Piggable Bend, Long Stubend, Tee, Short Stubend, Long Radius Bend. |
| Also as per National & International Standard &Specification | |
Duplex Steel UNS S31803 Buttweld Fittings contain a microstructural balance of around 50% austenite and 50% ferrite phases. This alloy provides them greater strength, usually with tensile strengths between 620 and 850 MPa and yield strengths of about 450 MPa. The alloy is rich in chromium, nickel, molybdenum, and nitrogen, which improve its pitting, crevice corrosion, and stress corrosion cracking resistance, particularly in chloride environments. The fittings also possess high toughness in cold temperatures and weldability, thus being ideal for industrial applications that are demanding.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex Steel S31803 | 0.030 max | 2 max | 1 max | 0.030 max | 0.020 max | 22 – 23 | 3 – 3.50 | 4.50 – 6.50 | 0.14 – 0.20 | Bal |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Nguyen Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Da Nang, Vietnam. We offer an extensive range of Duplex Steel UNS S31803 Buttweld 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.
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex Steel S31803 | 1.4462 | S31803 |
Choose Duplex Steel UNS S31803 Buttweld Fittings from Nguyen Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Duplex Steel UNS S31803 Buttweld Fittings offer several advantages, including excellent resistance to corrosion, pitting, and stress corrosion cracking, making them ideal for harsh environments. Their unique dual-phase microstructure provides a high strength-to-weight ratio, offering greater tensile and yield strength than standard austenitic stainless steels. These fittings also exhibit superior weldability, making them easier to work with in fabrication processes. UNS S31803 fittings are highly durable in industries such as chemical processing, oil and gas, and marine applications, ensuring long-lasting performance even in high-pressure, high-temperature environments.
Yes, custom sizes for Duplex Steel UNS S31803 Buttweld Fittings are available at Nguyen Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@nguyenfittings.com
Duplex Steel UNS S31803 Buttweld Fittings find extensive use in sectors that demand a high level of mechanical strength along with corrosion resistance. Typical uses are offshore oil and gas platforms, chemical processing plants, seawater desalination plants, pulp and paper mills, and seawater cooling systems. They are specifically suited for piping systems that are subject to hostile media such as chlorides, acids, and high-pressure fluids. Their superior resistance to stress corrosion cracking and localized corrosion and mechanical strength render the fittings an economical and dependable option for critical equipment in hostile environments.
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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