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Sayam Nickel Alloys is a reputed manufacturer and supplier of Duplex Steel Pipes in Hyderabad, providing high-performance piping solutions for demanding industrial environments. Manufactured using advanced production techniques and premium-quality raw materials, these pipes offer excellent strength, corrosion resistance, and dimensional accuracy. Sayam Nickel Alloys follows strict quality control procedures and international standards to ensure reliable performance and long service life. Their duplex steel pipes are widely used in industries where resistance to pressure, corrosion, and harsh operating conditions is essential.
| 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 |
Duplex Steel Pipes are made from alloys featuring a balanced austenitic and ferritic microstructure. The composition typically includes chromium, nickel, molybdenum, and nitrogen, which enhance corrosion resistance and mechanical strength. High chromium and molybdenum content provide excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Mechanically, duplex steel pipes offer higher yield strength than austenitic steels, good tensile strength, and excellent toughness, allowing them to withstand high pressure and demanding service conditions.
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Duplex Steel Pipes are extensively used in oil and gas pipelines, petrochemical plants, chemical processing units, and power generation systems. They are also widely applied in offshore platforms, marine engineering, desalination plants, and heat exchangers. Due to their superior resistance to chlorides and corrosive media, these pipes are ideal for transporting aggressive fluids and gases. Duplex steel pipes are commonly used in pressure vessels, structural piping, and industrial fluid handling systems requiring durability, safety, and long-term reliability.
