Home > Duplex Steel > Duplex Steel S31803 Pipe
Themban Nickel Alloys, a premier manufacturer and distributor based in Cape Town , Cape Town, proudly offers Duplex Steel Pipes S31803. Known for their exceptional strength and superior corrosion resistance, these pipes are engineered to perform in the most demanding environments. Ideal for various industrial applications, including chemical processing and marine environments, our Duplex Steel Pipes S31803 are designed to deliver reliability and durability. At Themban Nickel Alloys, we are committed to providing high-quality products that meet the rigorous standards of our clients, ensuring both performance and longevity in every application.
Pipe Range : 1 / 2″ NB – 8″ NB
Outer Diameter : 6.0-630mm
Wall Thickness : 0.3mm – 50 mm
Schedules : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length : Single Random, Double Random & Required Length
Specifications : ASTM A790 / ASME SA790
| Duplex | S31803 |
|---|---|
| Ni | 4.50 – 6.50 |
| Fe | 63.72 min |
| Cr | 22.0 – 23.0 |
| C | 0.030 max |
| Si | 1.00 max |
| Mn | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| N | 0.14 – 0.20 |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669; |
The composition of Themba Nickel Alloys’ Duplex Steel S31803 Pipes includes a balance of iron, 21% chromium, 5–6.5% nickel, 2.5–3% molybdenum, and trace amounts of nitrogen, manganese, and silicon. This unique mix gives the pipes remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides and oxidizing agents. They boast excellent mechanical properties, with a tensile strength ranging from about 620 to 880 MPa and a yield strength between 450 and 620 MPa. Plus, they offer high toughness, ductility, and fatigue resistance, ensuring they hold up under extreme temperatures, pressures, and chemical exposure.
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Duplex Steel S31803 Pipes are a go-to choice in industries that need corrosion-resistant, high-strength, and durable piping solutions. They’re perfect for chemical processing plants, oil and gas pipelines, desalination facilities, heat exchangers, marine and offshore structures, and power generation systems. These pipes maintain their structural integrity, resist scaling, deformation, and corrosion, and promise long-term durability even in aggressive environments. With Themba Nickel Alloys’ Duplex Steel S31803 Pipes, you can count on safe, high-performance, and reliable solutions, making them a top pick for critical industrial applications worldwide.
