Monel K-500 (UNS N05500 / W.Nr. 2.4375)

Monel K-500 (UNS N05500 / W.Nr. 2.4375) is a nickel-copper alloy which combines the excellent corrosion resistance of Monel 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminum and titanium to the nickel-copper base, and by heating under controlled conditions so that submicroscopic particles of Ni3 (Ti, Al) are precipitated throughout the matrix. The thermal processing used to effect precipitation is commonly called age hardening or aging.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Monel K-500	–	–	Monel K-500	N05500	–	2.4375	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Ni+Co	Al	TI	Cu	Fe
Monel K-500	≤0.025	≤0.50	≤1.50	≤0.020	≤0.010	≥63.0	2.30-3.15	0.35-0.85	27.0-33.0	≤2.00

Typical Physical and Mechanical Properties (RT, Annealed+Aged)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.44	1315-1350	1100	790	20	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B865, ASME SB865, DIN 17752, DIN 17753, DIN 17754
Plate, Sheet and Strip	DIN 17750
Pipe and Tube	DIN 17751
Welding Product	–
Others	ASTM B366, ASME SB366, DIN 17743

Features

Corrosion resistance in an extensive range of marine and chemical environments. From pure water to non-oxidizing mineral acids, salts and alkalis
Excellent resistance to high velocity sea water
Resistant to a sour-gas environment
Excellent mechanical properties from sub-zero temperatures up to about 480℃
Non-magnetic alloy