Monel® 400 UNS N04400

Monel® 400 is a ductile Nickel-Copper alloy with resistance to a wide variety of corrosive conditions. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. Monel 400's low corrosion rate in flowing seawater makes it well suited for the oil & gas industry, and other marine engineering applications.

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Monel 400 Strip, Coil, Foil, Wire, AMS 4544, QQN 2810D, ASTM B127



Monel® 400 is a ductile Nickel-Copper alloy with resistance to a wide variety of corrosive conditions. This alloy is most frequently applied in a range of environments going from mildly oxidizing through neutral and to moderately reducing conditions. Additional application area of this material is in marine environments and other non-oxidizing chloride solutions. Like with commercially pure Nickel, Monel® 400 is low in strength in the annealed condition, for this reason a variety of tempers are used to achieve higher strength levels.

Chemistry Typical

Nickel + Cobalt: 63.0 - 70.0
Manganese: 2.0 max
Silicon: 0.50 max
Cobalt: 1.00 max
Iron: 2.5 max
Sulfur: 0.024 max
Carbon: 0.30 max
Copper: Balance
Physical Properties

Density: 0.319 lbs/in3 8.8 g/cm3

Electrical Resistivity: 51.0 microhm-cm @ 68 °F

Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m•K):
212 °F (100 °C): 14.0 (24.1)

Mean Coefficient of Thermal Expansion: in/in/° F,(µm/m•C):
32 - 212 ° F (0 - 100 °C): 7.7 x 10-5 (13.9)

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

Magnetic Permeability: Annealed: moderately

Melting Point: 2460 ° F (1350 °C)


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

Mechanical Properties at Room Temperature

Properties: Annealed

Gauges:>.003 inches
Ultimate Tensile Strength: 70 - 85 KSI (483 - 586 MPA)
Yield Strength (0.2% offset): 28 KSI min (193 MPA min)
Elongation: 35% min
Hardness: Rb 68 max

Gauges: < .003"
Ultimate Tensile Strength: Report
Yield Strength (0.2% offset): 28 - 48 KSI (193 - 331 MPa)
Elongation: Report
Hardness: Report

Spring Temper:

Ultimate Tensile Strength: 100 KSI min (690 MPa min)
Yield Strength (0.2% offset): 90 KSI min (620 MPa min)
Elongation: 2% min

Properties: Tempered

Monel® 400 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 - Various grit finish for specific polish finished requirements.
* Not all finishes are available in 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 Wire Sales for custom wire finishes.

Heat Treatment

Monel® 400 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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