Grant Fittings, based in Manila, Philippines, is a leading manufacturer and supplier of Duplex Steel UNS S31803 Buttweld Fittings. Known for their superior corrosion resistance, high strength, and excellent weldability, UNS S31803 fittings are ideal for applications in demanding industries such as chemical processing, marine, and oil & gas. Our Duplex Steel UNS S31803 Buttweld Fittings are designed to perform reliably in high-pressure and high-temperature environments, ensuring long-lasting durability. At Grant Fittings, we offer customized solutions to meet the specific requirements of our clients, providing top-quality products for various 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 | |
Duplex Steel UNS S31803 Buttweld Fittings are composed of approximately 22-23% chromium, 4.5-6.5% nickel, 3% molybdenum, and small amounts of other elements like nitrogen and manganese. This combination provides enhanced strength, excellent resistance to corrosion, and good weldability. Mechanically, UNS S31803 offers high tensile strength (up to 700 MPa) and yield strength (around 450 MPa), along with impressive toughness and ductility, even in low temperatures. Its unique microstructure, consisting of both austenitic and ferritic phases, ensures superior resistance to stress corrosion cracking and pitting.
| 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 % |
Grant Fittings stands out as a trusted manufacturer and supplier of Duplex Steel UNS S31803 Buttweld Fittings right in the heart of Manila, Philippines. They focus on delivering top-notch pipe fittings, including elbows, tees, reducers, and caps, catering to demanding sectors like oil and gas, chemical processing, marine, and power generation. Crafted to meet the rigorous ASTM A815 and ASME B16.9 standards, these buttweld fittings are built to last, offering impressive durability, corrosion resistance, and outstanding mechanical performance. With cutting-edge manufacturing processes and a commitment to quality control, Grant Fittings delivers reliable piping solutions that can handle tough environments and high pressures, earning the trust of clients throughout the Philippines.
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 |
The Duplex Steel UNS S31803 buttweld fittings are a perfect blend of austenitic and ferritic stainless steels, providing exceptional strength and resistance to corrosion. Their typical chemical makeup features 22% chromium, 5-6% nickel, and 3% molybdenum, which gives them remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-rich settings. With a tensile strength of around 620 MPa and impressive toughness, these fittings maintain their integrity even under high temperatures and pressures. Grant Fittings ensures that every product goes through thorough testing and certification, guaranteeing they meet international standards and promise a long service life.
You’ll find Duplex Steel UNS S31803 buttweld fittings from Grant Fittings in various applications, including offshore oil and gas platforms, desalination plants, chemical industries, and power generation facilities. Their sturdy design makes them perfect for piping systems that face seawater, aggressive chemicals, and varying pressures. These fittings create leak-proof, durable connections that not only cut down on maintenance costs but also enhance operational efficiency.
Yes, custom sizes for Duplex Steel UNS S31803 Buttweld Fittings are available at Grant Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@grantfittings.com
Duplex Steel UNS S31803 Buttweld Fittings are widely used in industries where corrosion resistance and high strength are critical. These fittings are ideal for chemical processing, oil and gas, and petrochemical industries, where they withstand aggressive environments and high pressures. They are also commonly used in marine and offshore applications due to their resistance to seawater corrosion. Additionally, Duplex Steel UNS S31803 Buttweld Fittings are employed in power plants, desalination plants, and pulp and paper industries, providing reliable performance in high-temperature, high-stress 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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