Alloy 24 (UNS S34565 / W.Nr. 1.4565)

Alloy 24 (UNS S34564 / W.Nr. 1.4565) is a nitrogen and molybdenum austenitic stainless steel, resistant to intergranular corrosion and excellent resistance to pitting, crevice corrosion and stress corrosion cracking in sea water and other corrosive media.

Equivalent Grades

Remanit 4565 SAlloy 24S34565X2CrNiMnMoNbN 25-18-5-41.4565X2CrNiMnMoNbN 25-18-5-4

Chemical Composition, %

Alloy 24≤0.03≤1.05.0-7.0≤0.030≤0.01023.0-25.016.0-18.04.0-5.0≤0.100.4-0.6Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRC

Available Products and Specifications

Rod, Bar, Wire and ForgingsDIN EN 10088-5
Plate, Sheet and StripASTM A240/A240M, DIN EN 10088-4,
Pipe and TubeASTM A213/A213M, ASTM A249/A249M, ASTM A409/A409M,
Welding Product


  • Very good general corrosion properties
  • Very high resistance to localized corrosion such as pitting and crevice corrosion
  • Very good resistance to different types of stress corrosion cracking
  • Very good mechanical properties
  • Very good weldability
  • Very good formability
  • Many active references
  • Acc VDTÜV Werkstoffblatt applicable for pressure applications in a temperature range of -196-400 ° C
  • Very good resistance in seawater applications and other applications of acids and alkalis
  • Described in the standard for German swimming pool construction and tunnel applications Z-30.3-6 in the resistance class IV (5 / severe)
  • Use in flue gas desulfurization in power plants and vessel FGD
  • Substitute for various alloys such as Duplex, Alloy 31 or nickel alloys with many advantages


  • Chemical Process Industry (CPI)
  • Flue gas desulphurisation (FGD) in power plants as well as on large sea going vessels
  • Seawater desalination and other seawater applications
  • Food industry
  • Pharmaceutical industry
  • Heat exchangers
  • Nuclear industry