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.
Monel 401 Features
Monel 404 has low magnetic permeability and low Curie temperature. Because its low magnetic permeability is not significantly affected by processing and fabrication, it is particularly suitable for electronic parts.
Monel 401 Applications
- Electronic and electrical devices
- Marine fixtures
- Chemical processing equipment
- Gasoline tanks
- Boiler feed water heaters
- Heat exchangers
Monel 401 Specifications
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr | NF | BS |
Monel 401 Cuprothal 49 MWS-294 Constantan | CuNi44 NC050 | МНМц43-0.5 Копель | Monel 401 Alloy 294 | N04401 C72150 | CuNi44Mn1 | 2.0842 | – | – |
Chemical Compositions of Monel 401 Nickel Alloy
| 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 | / |
Monel 401 Product Forms and Standards
| 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 |