Monel 401 (UNS N04401 / W.Nr. 2.0842)

Monel 401 (UNS N04401 / W.Nr. 2.0842) is used primarily in specialized electrical and electronic applications. Monel 401 is readily autogenously welded by the gas-tungsten-arc process. Resistance welding is a very satisfactory method for joining the material. It also exhibits good brazing characteristics.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Monel 401 Cuprothal 49 MWS-294 Constantan	CuNi44 NC050	МНМц43-0.5 Копель	Monel 401 Alloy 294	N04401 C72150	CuNi44Mn1	2.0842	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Ni	Cu	Fe
Monel 401	≤0.10	≤0.25	≤2.25	≤0.020	≤0.015	40.0-45.0	Bal	≤0.75

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.91	1280-1300	480	250	30	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B164/ASME SB164, DIN 17752-17754
Plate, Sheet and Strip	ASTM B127/ASME SB127, DIN 17750
Pipe and Tube	ASTM B163/ASME SB163, ASTM B725/ASME SB725, ASTM B775/ASME SB775, ASTM B751/ASME SB751, DIN17751
Welding Product	–
Others	ASTM B366/ASME SB366(Fittings), DIN 17743

Features

Monel 401 is a ductile Copper Nickel alloy with a very low coefficient of electrical resistivity and resistance to a wide variety of corrosive conditions. Like with commercially pure Nickel, Monel 401 is low in strength in the annealed condition and can only be cold worked to a maximum of 120 KSI.