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Home > Duplex Steel > Duplex Steel Tubing S31803
Duplex Steel S31803 Tubing is made up of about 21–23% Chromium, 4.5–6.5% Nickel, 2.5–3.5% Molybdenum, and 0.14–0.20% Nitrogen, with Iron making up the rest. This dual-phase structure delivers double the yield strength (~450 MPa) compared to standard austenitic stainless steels, along with a tensile strength of around 620 MPa. The tubing showcases excellent impact strength, even in sub-zero temperatures, and offers superior corrosion resistance in harsh chloride-rich environments. Its high resistance to stress corrosion cracking, crevice corrosion, and erosion makes S31803 tubing perfect for demanding applications.
Duplex Steel Tubing S31803 is composed of 22% chromium, 5-6% nickel, 3% molybdenum, and nitrogen, with the balance being iron. This unique blend provides excellent corrosion resistance, especially in chloride-rich environments. The mechanical properties include a tensile strength of 620 MPa, yield strength of 450 MPa, and an elongation of 25%. The advantages of Duplex S31803 include superior resistance to stress corrosion cracking, pitting, and crevice corrosion, along with high strength, allowing for reduced wall thickness and cost-effective solutions in harsh environments like oil and gas, chemical processing, and marine industries.
| Standard | : | ASTM A790 / ASME SA790 UNS S31803, S32205, S32550, S32750, S32760 |
| Materials | : | ASTM A815 – UNS S31803 |
| Size | : | 1/2″NB TO 12 “NB IN |
| Seamless Pipes & Tubes Sizes | : | 1/2” NB – 8” NB |
| Welded Pipes & Tubes Sizes | : | 6” NB – 24” NB |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | : | Welded / Fabricated / Seamless |
| Length | : | Single Random, Double Random & Cut Length. |
| Thickness | : | 0.5-45mm |
| Outer Diameter | : | 6.0-630mm |
| Dimensions | : | OD(6.0-630)*WT(0.5-45)mm |
| Duplex Steel | Ni | Fe | C | Mn | Si | Mo | Cr | P | S |
| Bal | 0.03 | 1.o | 3.0 – 3.5 | 2.0 | 22.0 – 23.0 | 4.5 – 6.5 | 0.02 | 0.14 – 0.2 |
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex Steel | S31803 | 1.4462 |
| 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 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Duplex Steel Tubing S31803 from Bulan Pipes and Tubes ensures superior quality and durability, offering outstanding corrosion resistance and high strength. Our dedication to delivering exceptional service and reliable products guarantees customer satisfaction across a wide range of industrial applications. With our expertise in Duplex steel solutions, you can trust us to provide a top-tier, customized piping solution that meets your specific requirements.
Bulan Pipes and Tubes, one of the largest suppliers of Duplex Steel Tubing S31803 in the Indonesias, Jakarta. Offers a wide range of high-quality pipes and tubes designed for various industrial applications. Their extensive inventory and dedication to exceptional service make them a trusted choice for Duplex steel products in the region, delivering reliable solutions to meet diverse project requirements.
Yes, we provide custom sizes for Duplex Steel Tubing S31803 to meet your specific requirements. At Bulan Pipes and Tubes, our team is dedicated to delivering tailored solutions for all your piping and tubing needs. For more information, please contact us at sales@bulanpipes.id.
Duplex S31803 Tubing finds its place in various sectors, including offshore oil and gas, chemical processing, marine engineering, and desalination plants, where mechanical strength and corrosion resistance are crucial. It’s often used in heat exchangers, pressure vessels, piping systems, and structural components that face chloride-laden environments. The tubing excels in seawater systems, firefighting lines, and brine applications, where traditional stainless steel might not hold up. With its impressive strength-to-weight ratio, Duplex S31803 also allows for reduced material thickness and overall weight.
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