Duplex Stainless Steel Seamless Pips F53 UNS S32750 Super Duplex Steel Pipes

Material Description

• Alloy Name: Super Duplex Steel F53 (also known as UNS S32750)
• Chemical Composition:
  • Chromium (Cr): 24-26%
  • Nickel (Ni): 6-8%
  • Molybdenum (Mo): 3-5%
  • Nitrogen (N): 0.24-0.32%
  • Iron (Fe): Balance
  • Other Elements: Trace amounts of manganese, silicon, phosphorus, sulfur, and copper

Characteristics

• High Strength and Toughness: Super Duplex F53 provides higher strength and toughness compared to conventional austenitic stainless steels, due to its dual-phase microstructure.
• Excellent Corrosion Resistance: Offers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-containing environments.
• Good Weldability and Machinability: Can be welded and machined using standard techniques, although care must be taken to avoid excessive heat input during welding.
• High Resistance to Erosion and Fatigue: Suitable for applications involving exposure to abrasive and high-stress environments.

Physical Properties

• Density: 7.8 g/cm³
• Melting Point: Approximately 1350-1400 ℃
• Tensile Strength: ≥ 800 MPa
• Yield Strength: ≥ 550 MPa
• Elongation: ≥ 15%
• Hardness: Typically around 270 HV (Vickers Hardness)

Applications

1. Oil and Gas Industry: Used in offshore platforms, subsea equipment, and pipelines due to its high strength and excellent resistance to seawater corrosion.
2. Chemical Processing: Utilized in heat exchangers, pressure vessels, and reactors where high resistance to aggressive chemicals is required.
3. Marine Engineering: Suitable for shipbuilding, desalination plants, and other marine applications where resistance to seawater and salt spray is essential.
4. Power Generation: Employed in flue gas desulfurization systems, condensers, and other components exposed to high temperatures and corrosive environments.
5. Pulp and Paper Industry: Used in digesters, bleaching equipment, and other components exposed to harsh chemical processing conditions.

Manufacturing and Processing

• Manufacturing Method: Seamless pipes are manufactured through extrusion and cold drawing processes, ensuring high precision and superior surface quality.
• Processing: Super Duplex F53 can be processed using conventional cutting, welding, and forming techniques. It's important to use suitable welding consumables and techniques to maintain the material's properties.

Dimensions and Specifications

• Outer Diameter Range: Typically from 6 mm to 273 mm.
• Wall Thickness: Ranges from 0.5 mm to 15 mm.
• Length: Typically 6 meters, 12 meters, or customized according to client requirements.

Surface Treatment

• Pickling: Removes surface oxides and impurities.
• Polishing: Provides a smooth surface to meet specific application requirements.
• Passivation: Enhances corrosion resistance by forming a protective oxide layer on the surface.