Home > Duplex Steel > Duplex Steel Pipe
Themban Nickel Alloys is a prominent manufacturer and distributor based in Cape Town , Cape Town, specializing in Duplex Steel Pipes. Renowned for their exceptional strength and superior corrosion resistance, these pipes are ideal for challenging industrial applications, including petrochemical, marine, and oil & gas sectors. Duplex Steel Pipes offer a unique combination of austenitic and ferritic stainless steel, ensuring durability and long-term performance even in harsh environments. Themban Nickel Alloys is committed to providing high-quality products that meet international standards, making them a trusted partner for businesses in need of reliable and efficient piping solutions.
| Specifications | Cr | Ni | Mo | N | Mn | W | Cu |
| 2101 LDX | 21.5 | 1.5 | 0.3 | 0.22 | 5 | – | – |
| DX2202 | 23 | 2.5 | 0.3 | 0.2 | 1.5 | – | – |
| RDN 903 | 20 | 1.8 | 0.2 | 0.11 | 4.2 | – | – |
| 2304 | 23 | 4.8 | 0.3 | 0.10 | – | – | – |
| 2205 | 22 | 5.7 | 3.1 | 0.17 | – | – | – |
| Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Mo | N | Cu |
| S31803 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | – |
| S32205 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | – |
| S32750 | 0.03 | 1.20 | 0.035 | 0.02 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
| Mechanical properties | Tensile,min,ksi[MPa] | Yield,min,ksi[MPa] | Elongation,%(min) | Hardness,HB(max) |
| S31803 | 90 [620] | 65 [450] | 25 | 290 |
| S32205 | 95 [655] | 65 [450] | 25 | 290 |
| S32750 | 116 [800] | 80 [550] | 15 | 300 |
The composition of Themba Nickel Alloys’ Duplex Steel Pipes includes a mix of iron (the balance), chromium (20–22%), nickel (4–6%), molybdenum (2–3%), and trace amounts of nitrogen, manganese, and silicon, depending on the specific grade. This unique blend gives the pipes remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in environments with chlorides and oxidizing agents. Plus, they boast excellent mechanical properties, with tensile strength ranging from 620–880 MPa and yield strength between 450–620 MPa, along with high toughness, ductility, and fatigue resistance. This ensures they perform reliably even under extreme temperatures, pressures, and chemical exposure.
Contact us to get a quick quote for your requirement.
Duplex Steel 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 offer long-lasting durability in aggressive environments. With Themba Nickel Alloys’ Duplex Steel Pipes, you can count on safe, high-performance, and dependable solutions, making them a top pick for critical industrial applications worldwide.
