EN 1.4565 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. EN 1.4565 is the UNS number for this material. Alloy 24 is the common industry name.

It has a very low base cost among wrought superaustenitic stainless steels. In addition, it has a very high tensile strength and a very low embodied energy.

The graph bars on the material properties cards below compare EN 1.4565 stainless steel to: wrought superaustenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Alloy 24 is a nitrogen and molybdenum alloyed 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.

Fields of application are:

• 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

Some properties of EN 1.4565 Stainless Steel

• 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

• Forging temperature at about 1150-950 ° C with cooling on air.
• Solution annealing 1170-1120 ° C with cooling in water.

• Comparison of the critical pitting and crevice corrosion temperature with the PREn number