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

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Monel 401
Cuprothal 49
MWS-294
Constantan
CuNi44
NC050
МНМц43-0.5
Копель
Monel 401
Alloy 294
N04401
C72150
CuNi44Mn12.0842

Chemical Composition, %

AlloyCSiMnPSNiCuFe
Monel 401≤0.10≤0.25≤2.25≤0.020≤0.01540.0-45.0Bal≤0.75

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB
8.911280-130048025030/

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B164/ASME SB164, DIN 17752-17754
Plate, Sheet and StripASTM B127/ASME SB127, DIN 17750
Pipe and TubeASTM B163/ASME SB163, ASTM B725/ASME SB725, ASTM B775/ASME SB775, ASTM B751/ASME SB751, DIN17751
Welding Product
OthersASTM 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.

Applications

  • Wire wound resistors
  • Bimetal contacts
  • Electric and electronic applications
  • Marine engineering
  • Chemical and hydrocarbon processing equipment
  • Gasoline and freshwater tanks
  • Crude petroleum stills
  • De-aerating heaters
  • Boiler feed water heaters and other heat exchangers
  • Valves, pumps, shafts, fittings, and fasteners
  • Industrial heat exchangers
  • Chlorinated solvents
  • Crude oil distillation towers