Tim Fittings, located in Wellington, New Zealand, stands out as a top-notch manufacturer and supplier of high-quality industrial pipe fittings. They specialize in Duplex Steel UNS S31803 Buttweld Fittings, providing precision-engineered solutions that adhere to strict international standards. Their products are known for exceptional corrosion resistance, impressive strength, and durability, making them perfect for tough applications. With a commitment to reliability, timely delivery, and customer satisfaction, Tim Fittings caters to a variety of industries, including oil and gas, chemical processing, and marine engineering. Their UNS S31803 Buttweld Fittings guarantee safe and efficient fluid transfer, even in extreme conditions.
| 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 | |
These Duplex Steel UNS S31803 Buttweld Fittings are crafted from a well-balanced blend of about 22% chromium, 5% nickel, 3% molybdenum, and trace amounts of nitrogen, resulting in a dual-phase microstructure of austenite and ferrite. This unique composition provides high strength, excellent toughness, and remarkable resistance to pitting, crevice, and stress corrosion cracking. On the mechanical side, these fittings boast a tensile strength of around 620–850 MPa, a yield strength of 450–620 MPa, and an elongation of 25–35%, ensuring they hold up well under high-pressure and corrosive conditions in industrial 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 % |
Tim Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Wellington, New Zealand. 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 Tim 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 Tim Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@timfittings.co.nz
Duplex Steel UNS S31803 Buttweld Fittings are extensively utilized in industries that demand both strength and corrosion resistance. They are particularly suited for chemical processing, petrochemical plants, and offshore oil and gas operations, where exposure to chloride-rich or acidic environments is a common challenge. Additionally, these fittings are also used in water treatment, pulp and paper, and marine sectors due to their excellent resistance to pitting and crevice corrosion. With their seamless integration into pipelines, these fittings support high-pressure and high-temperature operations, ensuring long-lasting performance and safety in critical industrial systems.
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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