Super Duplex UNS S32760 / EN 1.4501 Stainless Steel Seamless Pipe

Products Specification

Introduction to S32760 Duplex Stainless Steel Pipe

Chemical Composition

• Chromium (Cr): 24–26%
• Nickel (Ni): 6–8%
• Molybdenum (Mo): 3–5%
• Tungsten (W): 0.5–1%
• Nitrogen (N): 0.2–0.3%
• Carbon (C): ≤0.03%
• Other elements: Iron (Fe) as the base, with small additions of copper (Cu) and manganese (Mn).

Mechanical Properties

• Tensile Strength: ≥750 MPa
• Yield Strength: ≥550 MPa
• Elongation: ≥25%
• Hardness (HB): ≤310
• Density: ~8.0 g/cm³

Corrosion Resistance

• Pitting and Crevice Corrosion: Due to high Cr, Mo, and W content, it performs well in chloride-rich environments (e.g., seawater, brine).
• Stress Corrosion Cracking (SCC): The duplex structure and nitrogen addition significantly reduce SCC risk compared to austenitic steels.
• General Corrosion: Resistant to acids, alkalis, and organic solvents, making it ideal for chemical processing.

Applications

• Oil and Gas Industry: Offshore pipelines, subsea equipment, and chemical injection systems.
• Chemical and Petrochemical Plants: Reactors, heat exchangers, and pipelines for corrosive media.
• Marine Engineering: Shipbuilding, seawater desalination systems, and coastal infrastructure.
• Power Generation: Flue gas desulfurization (FGD) systems and high-temperature components.
• Food and Pharmaceutical Industries: Equipment requiring high hygiene and corrosion resistance.

Advantages

• High Strength-to-Weight Ratio: Reduces material usage and costs in structural designs.
• Superior Durability: Long service life in harsh environments, minimizing maintenance.
• Weldability: Can be welded using standard techniques, though post-weld heat treatment is sometimes recommended to optimize properties.
• Resistance to High Temperatures: Maintains stability in applications up to ~300°C.

Standards and Specifications

• ASTM A790 (USA)
• EN 10216-5 (Europe)
• ISO 1127 (International)

Comparison with Other Duplex Steels

Conclusion