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