Zain Fittings, based in Surabaya, Indonesia, stands out as a top manufacturer and supplier of high-quality Duplex Steel UNS S31803 Buttweld Fittings. The company has earned a solid reputation for crafting durable, corrosion-resistant, and precisely engineered fittings that adhere to international standards. With state-of-the-art production facilities and a strong commitment to quality, Zain Fittings caters to various industries, including oil and gas, petrochemical, marine, and power generation. Their Duplex Steel UNS S31803 Buttweld Fittings are celebrated for their exceptional strength, excellent weldability, and reliable performance in tough environments, making them perfect for critical industrial applications.
| 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 fittings boast a well-balanced microstructure of austenite and ferrite, providing an impressive mix of strength and corrosion resistance. Typically, their composition includes chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), along with manganese, silicon, nitrogen, and iron as the base. They offer a tensile strength of about 620 MPa, a yield strength of 450 MPa, and an elongation of 25%. This alloy is known for its high resistance to pitting, crevice corrosion, and stress corrosion cracking, along with good toughness and fatigue strength in both hot and cold conditions.
| 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 % |
Zain Fittings is a leading supplier of Duplex Steel UNS S31803 Buttweld Fittings in Jakarta, Indonesia. 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 Zain 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 Zain Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@zainfittings.id
Duplex Steel UNS S31803 Buttweld Fittings find extensive use in industries that require high strength and corrosion resistance. You’ll commonly see them in offshore oil drilling, chemical processing, desalination plants, heat exchangers, and pressure vessels. They’re also utilized in pipelines, refineries, and marine settings where chloride-induced corrosion poses a risk. The blend of mechanical strength, resistance to aggressive media, and cost-effectiveness makes these fittings a go-to choice for systems that demand durability and long-term reliability in challenging operating conditions.
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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