Scorodite Stainless India Private Limited is a leading name in delivering high-performance Duplex Steel S31803 Tubes engineered for excellence in demanding industrial environments. These tubes provide superior mechanical strength, resistance to stress corrosion cracking, and excellent weldability—making them a preferred material in various sectors requiring reliable stainless performance.
Duplex Steel S31803 Tubes are produced by welding together duplex steel strips or plates, followed by heat treatment to achieve precise metallurgical characteristics. This steel grade is a nitrogen-enhanced duplex stainless steel alloy containing approximately equal parts austenite and ferrite. This dual-phase structure offers a significant improvement over standard austenitic or ferritic stainless steels. These tubes conform to international standards such as ASTM A789, ASME SA789, EN 10217-7, and ISO 1127. They are also identified as UNS S31803 or DIN 1.4462.
The key advantages of Duplex Steel S31803 Tubes include excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. Their yield strength is nearly double that of conventional austenitic stainless steel grades, resulting in material and cost savings. The tubes offer high thermal conductivity and low thermal expansion, providing enhanced dimensional stability under thermal cycling. These characteristics make them ideal for aggressive chemical processing and offshore structural use.
Scorodite Stainless India Private Limited is among the most trusted Duplex Steel S31803 Tubes Manufacturers, delivering tubes with consistent wall thickness, uniform weld seams, and top-notch corrosion resistance. Our tubes are precisely fabricated to meet the most demanding applications across global industries, using advanced welding technology and strict quality controls. As reliable Duplex Steel S31803 Tubes Suppliers, Scorodite Stainless India Private Limited ensures timely delivery, traceability, and full compliance with ASTM A789 / ASME SA789 specifications. We supply to industries where pressure, corrosion, and durability are non-negotiable. Whether for large-scale projects or niche custom orders, our product range is tailored to perform.
Serving as dependable Duplex Steel S31803 Tubes Stockists, Scorodite Stainless India Private Limited maintains extensive inventories to fulfill urgent and bulk demands across international markets. Our ready stock includes a range of diameters, wall thicknesses, and lengths, ensuring quick dispatch and competitive pricing. Scorodite Stainless India Private Limited has a global reach as one of the reputable Duplex Steel S31803 Tubes Exporters, supplying to customers across Europe, Asia, the Middle East, and the Americas. Our export-ready tubes are tested for mechanical properties, chemical composition, and corrosion resistance, ensuring compliance with global industry standards.
Scorodite Stainless India Private Limited’s Duplex Steel S31803 Tubes are the ideal fusion of strength, resistance, and economy. Whether it’s for high-pressure pipelines or corrosive fluid transfer, our tubes meet performance expectations across every standard.
| Standard | ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789 |
|---|---|
| Materials | ASTM A815 – UNS S31803 |
| Size | 1/2″NB TO 12 “NB IN |
| Pipes & Tubes Sizes | 6” NB – 24” NB |
| Thickness | 0.5-45mm |
| Outer Diameter | 6.0-630mm |
| Dimensions | OD(6.0-630)*WT(0.5-45)mm |
| Schedule | SCH 10, SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Length | Single Random, Double Random & Cut Length. |
| 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 % |
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