Monel® 400 Wire UNS N04400

Monel 400 wire is a ductile material and with combination of nickel and copper is resistant to a wide variety of corrosive conditions.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire AMS 4730, AMS 4544, QQN 2810D, ASTM B127, ASTM B164

Monel® 400 or Alloy 400 Description Wire Description

Alloy 400 is a ductile material and with combination of nickel and copper is resistant 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.


Cable wrap for oil and gas production
Marine components
Chemical processing

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: microhm-cm:
At 68ºF: 51.0

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

Mean Coefficient of Thermal Expansion: in/in/°F,(μm/m•C):
32-212°F(0-100ºC): 7.7 x 10-6 (13.9)

Modulus of Elasticity: KSI (MPa) in Tension
26x 10³(179 x 10³)

Magnetic Permeability: Annealed: moderately

Melting Point: 2460°F (1350°C)

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

Alloy 400 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

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

Standard Wire Finishes

Extra Clean: (XC) Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”
Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications

Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation.

A soap finish is available in tempered products.
Plated: Many plating options are available.
*Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting

Heat Treatment

Alloy 400 is non hardenable by heat treatment.


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
*Monel® 400 is a registered trademark of the INCO family of companies.

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and 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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