Monel® 401 Wire UNS N04401

Alloy 401 is a nickel-copper alloy with a very low coefficient of electrical resistivity and resistance to a wide variety of corrosive conditions.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Unplated Specifications: DIN 17471

Nickel 401 Alloy Description

Alloy 401 is a 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, AAlloy 401 is low in strength in the annealed condition and can only be cold worked to a maximum of 120 KSI.


Specialized electrical and electronic applications
Resistance heaters and circuits

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)
70ºF (21ºC): 13.3 (21.0)

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

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

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

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

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

Properties Tempered

Alloy 401can 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
Alloy 401 is non hardenable by heat treatment.


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
*Monel® 401 is a registered trademark of Special Metals Corp

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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