MONEL® alloy 404



Electronic and electrical devices, marine fixtures, chemical processing equipment, gasoline tanks, boiler feed water heaters and other heat exchangers.


Monel® 404 (Nickel 404) has high strength and toughness over a wide temperature range with excellent resistance to many corrosive environments. The alloy also has low permeability and good brazing characteristics.


Nickel + Cobalt: 52.0 – 57 .0
Manganese: 0.10 max
Silicon: 0.10 max
Cobalt: 1.00 max
Iron: 0.50 max
Sulfur: 0.024 max
Carbon: 0.15 max
Copper: Balance
Aluminum: 0.05 max


Density: 0.322 lbs/in3, 8.91 g/cm3

Electrical Resistivity: ohm-cir mil/ft (microhm-m)
At 70 °F (21 °C): 294 (0.498)

Specific Heat: Btu/lb-°F (J/g-°C)
At 70 °F (21 °C): 0.0989 (0.414)

Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m-°C)
At 70 °F (21 °C)-133 (21)
Mean Coefficient of Thermal Expansion: µin/in-°F,(µm/m°C)
70 – 200 °F (21 – 93 °C) 7.39 (13.3)
70 – 572 °F (21 – 300 °C) 8.50 (15.3)
70 – 1000 °F (21 – 539 °C) 9.22 (16.6)
70 – 1500 °F (21 – 816 °C) 9.78 (17.6)
Modulus of Elasticity: ksi (MPa) in Tension
24.5 X 103 (169 X 103)
Magnetic Permeability, H = 200 Oersteds: Annealed 1.0017 max
Melting Point: 2370 °F (1300 °C)


Coil -Strip, Foil, Ribbon
Wire -Profile, Round, Flat, Square



Ultimate Tensile Strength: 70 KSI min (483 MPA min)
Yield Strength (0.2% offset): 25 KSI min (172 MPA min)
Elongation: 35% min


Monel® 404 (Nickel 404) can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information.




#1 – Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
#2D – Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process.
#2B – Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA- Bright annealed cold rolled and bright annealed
#CBA- Course bright annealed cold rolled matte finish and bright anneal
#2 – Cold Rolled
#2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part.
Polished – Various grit finish for specific polish finished requirements.
* Not all finishes are available for all alloys – Contact Sales for applicable finishes.


XC – Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease – Ultra bright finish (for decorative applications)
Soap – Soap coating on tempered wire to act as lubricant
* Contact Ulbrich Wire for special finish requests.


Monel® 404 (Nickel 404) is non hardenable by heat treatment.


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”.

Lion Metal can supply Monel in two Grades Type 400 and Type 404. The two alloys are listed side by side to illustrate the difference between the two even though they are used in similar applications.

Chemistry By % Weight

Type 400 MonelType 404 Monel
C0.3% MaxC0.15% Max
Cu28-34% MaxCu45.5% Max
Fe2.5% MaxFe0.5% Max
Mn2% MaxMn0.1% Max
Ni63% MinNi52-57%
(Nickel Content includes Cobalt)
S0.024%S0.024 Max
Si0.5% MaxSi0.1% Max
Al0.05% Max
Typical Mechanical Properties
Ultimate Tensile Strength79,500 PSI (Annealed Temper)
Yield Strength34,500 PSI (Annealed Temper)
Elongation @ Break48%
Modulus of Elasticity24500 KSI
Poisson’s Ratio0.295

Typical Physical Properties

400 Monel404 Monel
Density0.318 lbs/cu in0.322 lbs/cu in
Melting Point1325° C
Electrical Resistivity @ RT5.47 Microhm-cm5 Microhm-cm
Thermal Conductivity @  RT21.8 W/m-k