Braxton Fittings is a leading manufacturer and supplier based in Midland, UK, specializing in high-quality piping solutions for diverse industrial applications. With a strong commitment to precision and reliability, we offer a wide range of fittings, including Duplex Steel S31803 Pipe Fittings. Renowned for their excellent corrosion resistance, high strength, and durability, our Duplex Steel S31803 fittings are ideal for demanding environments such as the chemical, marine, and oil and gas industries. We ensure superior performance and long-lasting reliability in every product.
Specifications ASTM A815 / ASME SA815
Dimensions ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size 1/2″ NB to 24″NB in
Type Seamless / Welded / Fabricated
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
Duplex Steel S31803 Pipe Fittings are made from a balanced mix of austenitic and ferritic stainless steel. The composition typically includes 21-23% chromium, 4.5-6.5% nickel, 2.5-3.5% molybdenum, and trace elements of nitrogen, manganese, and carbon. This composition provides high strength and excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Mechanical properties include a tensile strength of 620 MPa, yield strength of 450 MPa, and an elongation of 25%. Duplex Steel S31803 offers superior weldability, toughness, and high resistance to corrosion in various industrial environments.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| S31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Braxton Fittings is a leading supplier of Duplex Steel S31803 Pipe Fittings in Midland, UK. We offer an extensive range of Monel K500 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 | UNS | WERKSTOFF NR. |
| Duplex 2205 | S31803 | 1.4462 |
Duplex Steel S31803 Pipe Fittings from Braxton Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
Duplex Steel S31803 pipe fittings offer exceptional corrosion resistance, particularly against pitting, crevice corrosion, and stress corrosion cracking, making them ideal for harsh environments. They provide high strength and excellent resistance to fatigue, making them durable under pressure. The alloy’s good weldability and formability enhance the ease of fabrication. Duplex Steel S31803 pipe fittings also offer superior toughness and stress resistance, ensuring reliability in demanding applications such as chemical processing, marine, and oil & gas industries. Their cost-effectiveness and long-lasting performance make them a preferred choice for critical piping systems.
| Outer Diameter And Inside Diameter | Equivalent | Diameter Of Pipe Nominal | Typical Threads In Inches |
| 5/16 | 0.313 | 1/16 | 27 |
| 13/32 | 0.405 | 1/8 | 27 |
| 35/64 | 0.540 | 1/4 | 18 |
| 43/64 | 0.675 | 3/8 | 18 |
| 27/32 | 0.840 | 1/2 | 14 |
| 1-3/64 | 1.050 | 3/4 | 14 |
| 1-5/16 | 1.315 | 1 | 11-1/2 |
| 1-21/32 | 1.660 | 1-1/4 | 11-1/2 |
| 1-29/32 | 1.900 | 1-1/2 | 11-1/2 |
| 2-3/8 | 2.375 | 2 | 11-1/2 |
| 2-7/8 | 2.875 | 2-1/2 | 8 |
| 3-1/2 | 3.500 | 3 | 8 |
| 4 | 4.000 | 3-1/2 | 8 |
Yes, custom sizes for Duplex Steel S31803 Pipe Fittings are available at Braxton Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@braxtonfittings.co.uk.
Duplex Steel S31803 pipe fittings are widely used in industries requiring high strength, corrosion resistance, and durability. These fittings are ideal for chemical processing, oil and gas, petrochemical, marine, and power generation applications. They are used in pressure vessels, heat exchangers, piping systems, and offshore platforms, where resistance to stress corrosion cracking, pitting, and crevice corrosion is essential. Their excellent mechanical properties and resistance to harsh environments make them a preferred choice for demanding applications in both onshore and offshore environments.
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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