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S32760 Copper-and-Tungsten-Alloyed Super Duplex Stainless Steel Seamless Pipe

Super duplex stainless steel (25Cr-7Ni-3Mo-0.7Cu-0.7W-N).
Ferrite austenite equilibrium structure (about 50/50).
The addition of copper and tungsten further improves local corrosion resistance.

Product Details
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Performance

  • Corrosion resistance equivalent PREN ≈ 43~44.
  • Extremely high strength: Tensile strength ≥ 750 MPa; Yield strength ≥ 550 MPa (approximately twice that of 316L).
  • Excellent resistance to pitting corrosion, crevice corrosion, and chloride ion stress corrosion cracking in seawater and sulfur-containing oil and gas environments.
  • Good low-temperature toughness (as low as -50 ℃).

Applications

  • Marine oil and gas subsea manifolds, flowlines, and risers.
  • Seawater intakes and desalination high-pressure pipelines.
  • Chemical process vessels for treating chlorides and organic acids.
  • Flue gas desulfurization (FGD) systems.
  • Pumps, valves, and fasteners in harsh marine environments.

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