Yash Fittings, from Mumbai, India, is a well-known Duplex Steel UNS S31803 Buttweld Fittings manufacturer and supplier of high-quality metal fittings. Duplex Steel S31803 is one of the versatile stainless steel alloys which offers good high strength and better resistance to corrosion. These buttweld fittings have superior resistance to crevice corrosion, pitting, and stress corrosion cracking for high-demanding industrial applications. Yash Fittings guarantees accurate production and rigorous quality control, so they are a reliable option for customers in various businesses 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 are distinguished by their superior chemical, mechanical, and physical properties. Chemically, they have an equilibrium microstructure of ferrite and austenite with higher concentrations of chromium, molybdenum, and nitrogen, exhibiting higher resistance to corrosion in the presence of chlorides. They are mechanically higher in tensile strength, better in yield strength, and show higher toughness, owing to which they are designed for usage in high-pressure and high-temperature applications. Physically, Duplex Steel S31803 has good thermal conductivity, weldability, and excellent durability, with a good assurance of consistent performance in extreme environments.
| 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 % |
Yash Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Mumbai, India. 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 Yash Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Yes, custom sizes for Duplex Steel UNS S31803 Buttweld Fittings are available at Yash Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@yashfittings.com
Duplex Steel UNS S31803 Buttweld Fittings find extensive applications in high-strength and superior corrosion-resistant industries. They find a high degree of usage in oil and gas, petrochemical, offshore, chemical processing, and power plant industries. They are used optimally in pipelines, heat exchangers, pressure vessels, and offshore platforms where they provide structural support under severe conditions, such as those involving chlorides. Their strength, durability, and corrosion resistance make them the first choice in most of the world’s critical industrial applications.
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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