Monel® 401 UNS N04401

Monel® 401 is a ductile Nickel-Copper alloy with a very low coefficient of electrical resistivity and resistance to a wide variety of corrosive conditions.

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Strip, Coil, Foil, Wire, DIN 17471


Precision foils for electrical resistance heaters and circuits


Monel® 401 is a ductile Nickel-Copper 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.

Chemistry Typical

Nickel + Cobalt: 43.0 - 45.0
Manganese: 2.25 max
Cobalt: 0.25 max
Iron: 0.75 max
Carbon: 0.10 max
Sulfur: 0.015 max
Silicon: 0.25 max
Copper: Balance

Physical Properties

Density: 0.321 lbs/in3, 8.88 g/cm3

Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m•K)
70 °F (21 °C): 13.3 (21.0)

Electrical Resistivity, ohm•circ mil/ft (µO•m):
70 °F: 294

Mean Coefficient of Thermal Expansion: in/in/°F
70 - 200 °F: 7.6 x 10-6
70 - 500 °F: 8.5 x 10-6
70 - 1000 °F: 9.2 x 10-6

Modulus of Elasticity: ksi (MPa) in Tension
26 X 103 ( 179 X 103)

Melting Point: 2335 °F (1280 °C) approx.


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

Mechanical Properties at Room Temperature

Properties: Annealed*

Ultimate Tensile Strength: 50 - 60 KSI (345 - 414 MPa)
Yield Strength (0.2% offset): 30 - 40 KSI (207 - 276 MPa)
Elongation: Report
Hardness: Rb 60-75

* These values are based on typical capability data and can be adjusted by control of process variables as needed. Consult Ulbrich Technical Service for desired values.

Properties: Tempered

Monel® 401 can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information.

Additional Properties

Corrosion Resistance

Refer to NACE (National Associate of Corrosion Engineers) for recommendations.


#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 - VariOUij grit finjs for, spe5i!i<epolis􀀌fi1:1isbed r,equ·rernynt􀀑 as Corp
* Not all finishes are available for all alloys - Contact Ulbrich Sales for more information.

Wire 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 custom finishes.

Heat Treatment

Monel® 401 is non hardenable by heat treatment.


For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods".

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the 'applications' noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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