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
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Remanit 4565 S | – | – | Alloy 24 | S34565 | X2CrNiMnMoNbN 25-18-5-4 | 1.4565 | – | X2CrNiMnMoNbN 25-18-5-4 | – | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Mo | Nb | N | Fe |
Alloy 24 | ≤0.03 | ≤1.0 | 5.0-7.0 | ≤0.030 | ≤0.010 | 23.0-25.0 | 16.0-18.0 | 4.0-5.0 | ≤0.10 | 0.4-0.6 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRC |
8.00 | 1330-1370 | 800-950 | ≥420 | ≥35 | / |
Available Products and Specifications
Rod, Bar, Wire and Forgings | DIN EN 10088-5 |
Plate, Sheet and Strip | ASTM A240/A240M, DIN EN 10088-4, |
Pipe and Tube | ASTM A213/A213M, ASTM A249/A249M, ASTM A409/A409M, |
Welding Product | – |
Others | – |
Features
- 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
Applications
- 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