Project Description

Alloy 24 (UNS S34565)

Alloy 24 (UNS S34565) 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

Product Forms

Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings

Chemical Composition, %


Typical Physical & Mechanical Properties (RT, Solution Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaElongation,%


Rod, Bar, Wire, ForgingsASTM B425, ASTM B564, ASME SB425, ASME SB564, ISO 9723/9724/9725, DIN 17752-17754
Plate, Sheet, StripASTM B424 ASTM B906, ASME SB424, ASME SB906, ISO 6208, DIN 17750
Pipe, TubeASTM B163, ASTM B423, ASTM B704, ASTM B705, ASTM B751, ASTM B775, ASTM B829, ASME SB163, ASME SB423, ASME SB704, ASME SB705, ASME SB751, ASME SB775, ASME SB829, ISO 6207, DIN 77751
OthersDIN 17744, ASTM B366, ASME SB366


  • 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