Monel® 404 Wire UNS N04404

Nickel 404 has good strength, toughness excellent resistance to many corrosive environments.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire ASTM F-96

Nickel 404 or Monel® 404 Description

Nickel 404 has good strength, toughness excellent resistance to many corrosive environments. The alloy also has low permeability and good brazing characteristics.


Marine fixtures
Chemical processing equipment
Boiler feed water heaters and other heat exchanger components
Electronic devices where ceramic to metal sealing is required

Chemistry Typical

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

Physical Properties

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 70ºF (21ºC) – 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)
24.5 x 10³ (169 x 10³)in Tension

Magnetic Permeability, H = 200 Oersteds: Annealed 1.0017 max

Melting Point: 2370°F (1300°C)

Mechanical Properties at Room Temperature

Properties: Annealed

Ultimate Tensile Strength: 70 KSI min (483 MPA min)

Yield Strength (0.2% offset): 25 KSI min (172 MPA min)

Elongation: 35% min

Properties: Tempered

Nickel 404can 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

Nickel 404 is non hardenable by heat treatment.


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

Monel® 404 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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