Duplex Stainless Steel 2205

Duplex Stainless Steel 2205 丨F51

2205 is a duplex stainless steel featuring a combination of austenitic and ferritic phases. Renowned for its high strength, good ductility, and outstanding corrosion resistance, particularly against pitting and crevice corrosion, it stands out. With a yield strength double that of standard austenitic stainless steel grades, it offers exceptional performance. However, it’s not recommended for use at temperatures exceeding 300°C.

Duplex stainless steel 2205 / F51 / UNS S32205 S31803 / W.Nr. 1.4462

Applications of stainless steel 2205:

Stainless steel 2205 finds widespread application in industries demanding superior corrosion resistance and strength. Its usage spans across various sectors including chemical processing, oil and gas exploration, marine environments with high chloride levels, as well as paper digesters. Moreover, it serves as a preferred material for structural components in ships, boats, well-drilling equipment, tanks, pressure vessels, valves, and piping systems.

Normal product forms:

  • Round, Square, Hexagon, Flat Bars & Wires
  • Seamless / Welded Pipes & Tubes
  • Hot & Cold Rolled Plates & Sheets
  • Forged Bars
  • Forged Flanges
  • Pipe Fittings
  • Fasteners

Specifications/Standard:  UNS S32205, UNS S31803, ASTM A276/A276M, ASTM A240/A240M

Chemical Composition:
  • Chromium (Cr): 21-23%
  • Nickel (Ni): 4.5-6.5%
  • Carbon (C): 0.30% max
  • Manganese (Mn): 2% max
  • Nitrogen (N): 0.2% max
  • Silicon (Si): 1.00% max
  • Phosphorus (P): 0.035% max
  • Sulfur (S): 0.03% max

Physical Constants and Thermal Properties

  • Density: 7.83 g/cm³
  • Melting point: 1385-1440°C
  • Specific heat capacity: 470 J/(kg·K) at 20°C, increasing to 560 J/(kg·K) at 300°C
  • Thermal conductivity: 15.0 W/(m·K) at 20°C, increasing to 18.0 W/(m·K) at 300°C
  • Mean coefficient of thermal expansion: 13.5 (10-6/K) at 20-100°C, increasing to 14.6 (10-6/K) at 20-300°C

Mechanical Property:

  • Tensile Strength: 621 MPa
  • Yield Strength: 448 MPa
  • Elongation: 25%
  • Hardness: 293 Brinell

相关产品