Scorodite provides high performance Duplex Steel S31803 Seamless Tubes designed for strength, durability, and consistent performance in aggressive environments. These Tubes combine the benefits of ferritic and austenitic structures, giving them superior mechanical properties and improved corrosion protection. Their balanced microstructure makes them a trusted choice for industries that demand reliability under pressure, temperature fluctuations, and corrosive conditions.
Duplex Steel S31803 Seamless Tubes are produced from a nitrogen enhanced duplex grade identified as ASTM A790 UNS S31803 and ASME SA790. This grade is valued for excellent resistance against pitting, crevice attack, and chloride stress corrosion cracking. The seamless manufacturing method ensures uniformity, smooth flow, and higher pressure handling capability. Scorodite offers these Tubes to meet global standards such as ISO, ASTM, ASME, EN, DIN, and JIS to support consistent quality across international markets.
These Tubes represent a versatile solution for applications that require toughness and corrosion resistance. They offer a higher yield strength than many standard austenitic stainless steels, making them ideal for structural and heavy duty use. Their duplex structure slows corrosion and offers better fatigue strength, giving industries confidence when fluid integrity is critical.
Scorodite is recognized among trusted Duplex Steel S31803 Seamless Tubes Manufacturers due to strict quality control, advanced production systems, and global compliance. The company focuses on providing seamless Tubes that meet performance expectations in sectors where precision matters. From selection of raw material to final inspection, every step is optimized for reliability.
These Tubes offer significant advantages. They deliver high resistance to stress corrosion cracking, particularly in chloride rich environments. Their strength is almost double that of conventional stainless steel grades, enabling weight savings and better structural reliability. Outstanding weldability and formability further broaden their usability. Their resistance to fatigue and erosion enhances longevity, reducing downtime and maintenance costs. Scorodite also supports project requirements with consistent availability as leading Duplex Steel S31803 Seamless Tubes Suppliers.
Industries choose Duplex Steel S31803 Seamless Tubes for chemical processing units because chemical processing requires superior corrosion resistance. They are used in oil and gas Tubelines, where strength and pressure tolerance are essential. In desalination plants, they withstand chloride rich environments. Their presence in pulp and paper manufacturing ensures durability against acidic and alkaline exposure. They support marine engineering where constant contact with seawater demands corrosion protection. Scorodite strengthens supply chains in all these fields as dependable Duplex Steel S31803 Seamless Tubes Stockists.
The ASTM and international naming variations include ASTM A790 UNS S31803, ASME SA790 S31803, EN 1.4462, DIN X2CrNiMoN22-5-3, ISO 31803, BS 31803, and JIS SUS 31803. This allows users around the world to cross reference specifications easily and secure materials matching local codes. Scorodite aligns with these standards to ensure compatibility across different regions.
These seamless Tubes serve industries such as heat exchangers, boiler equipment, pharmaceutical systems, food processing units, pressure vessels, hydraulic lines, offshore platforms, shipbuilding, refineries, petrochemical systems, and water treatment infrastructure. The demanding nature of these operations makes them rely on proven materials, supported by Scorodite as one of the reliable global Duplex Steel S31803 Seamless Tubes Exporters.
| Standard | ASTM / ASME SA 790. SA 789 , SA 790 |
|---|---|
| Materials | ASTM A815 – UNS S31803 |
| Size | 1/2″NB TO 12 “NB IN |
| S31803 Seamless Tubes & Tubes Sizes | 15 NB - 150 NB IN/ 3.35 To 101.6 mm OD |
| Thickness | 0.5-45mm |
| Outer Diameter | 6.0-630mm |
| Dimensions | OD(6.0-630)*WT(0.5-45)mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Tubes |
| Length | Single Random, Double Random & Cut Length. |
| Duplex UNS S31803 Tube | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
|---|---|---|---|---|---|---|---|---|---|---|
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 - 3.5 | 22.0 - 23.0 | 0.03 | 4.5 - 6.5 | 0.14 - 0.2 | Bal |
| Duplex UNS S31803 Tube | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|---|
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000 , MPa - 550 | Psi - 116000 , MPa - 800 | 15 % |
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