Teerasil Fittings and Plates, based in Thailand, Bangkok, is a reliable manufacturer and supplier of top-notch Duplex Steel UNS S31803 Buttweld Fittings. These fittings are essential for industries that demand exceptional mechanical strength, outstanding corrosion resistance, and long-lasting durability. Known for their precision fabrication and commitment to international standards, the company prioritizes customer satisfaction by providing fittings that are dimensionally accurate, leak-proof, and built to last. They cater to various sectors, including oil and gas, chemical processing, desalination, power generation, and marine industries. With state-of-the-art manufacturing facilities, rigorous inspections, and strict quality control, Teerasil Fittings and Plates guarantees safe, efficient, and cost-effective piping solutions for critical industrial environments around the globe.
| 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 | |
The Duplex Steel UNS S31803 Buttweld Fittings are crafted from a well-balanced austenitic-ferritic microstructure, which gives them superior tensile and yield strength compared to standard stainless steels. They also boast remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. These fittings are designed for excellent weldability, structural integrity, and consistent mechanical properties, making them perfect for high-stress, corrosive, and safety-critical piping systems.
| 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 % |
Teerasil Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Bangkok, Thailand. 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 Teerasil 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 Teerasil Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@teerasilfittings.com
You’ll find Duplex Steel UNS S31803 Buttweld Fittings in a variety of applications, including offshore oil platforms, subsea pipelines, heat exchangers, pressure vessels, chemical processing units, and seawater desalination plants. They’re also used in the pulp and paper industry, power generation systems, and water treatment facilities, where enhanced corrosion resistance and mechanical strength are vital. Their blend of durability, reliability, and cost-effectiveness ensures smooth, safe, and efficient operations even in the toughest industrial conditions worldwide.
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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