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

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

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.

Hunan Dinghan New Material Technology Co., LTD