Heer Fittings is a trusted producer and supplier of Duplex Steel UNS S31803 Buttweld Fittings in Delhi, India, which provides high-performance piping components for corrosive and high-pressure usage. These fittings—offered in common forms such as elbows, tees, reducers, caps, and crosses—are manufactured to comply with ASTM A815 and ASME B16.9 standards. Duplex S31803, also known as 2205 duplex stainless steel, has a two-phase microstructure of approximately equal proportions of austenite and ferrite. The microstructure confers considerably enhanced strength and corrosion resistance compared to typical austenitic stainless steels, making it suit for severe service 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 | |
UNSM S31803’s chemical composition generally consists of 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, and a trace of nitrogen to favor mechanical and corrosion properties. Duplex S31803 has a tensile strength of about 620–800 MPa, minimum yield strength of 450 MPa, and elongation of about 25%. Its duplex microstructure allows it to have superior resistance to chloride stress corrosion cracking, pitting, crevice corrosion, and erosion-corrosion, especially in environments where there is regular exposure to seawater or aggressive chemicals. Good weldability and dimensional stability are also retained in the alloy.
| 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 % |
Heer Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Delhi, 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 Heer 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 Heer Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@heerfittings.com
Duplex Steel UNS S31803 Buttweld Fittings find extensive application in the oil and gas industry, offshore platforms, petrochemical plants, heat exchangers, chemical processing, desalination plants, and marine uses. The fittings are ideally suited for piping systems that need to resist corrosive fluid under pressure and high temperature. Their strength-to-weight ratio also allows thinner walled designs without reducing durability, making them an economical solution for high-integrity long-term applications needing top-class corrosion resistance and mechanical integrity.
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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