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Strip – Monel® Alloy 400

Strip – Monel® Alloy 400

Monel® Alloy 400

UNS N04400
W.Nr 2.4360/2.4361


Valves, pumps, seals, springs, heat exchangers


Monel® 400 is a Nickel-Copper alloy with high strength and toughness and remains ductile even at subzero temperatures. Age-hardening treatments are not required to obtain the high strength properties of Monel® 400 because it is a solid-solution alloy that is hardened only through cold working. The alloy is resistant to corrosion in many reducing environments, offering excellent corrosion resistance in seawater, hydrofluoric acid, sulfuric acid, and hydrochloric acid. Monel® 400 also shows resistance to stress corrosion cracking and pitting in fresh water, is resistant to oxidization and can operate from cryogenic temperatures to 500°F (260°C).

Industries Supplied

Oil & Gas Extraction, Marine, Chemical and Petrochemical Processing

Nominal Composition

C: 0.03 max
Mn: 2.00 max
Si: 0.5 max
S: 0.024 max
Cu: 28.0 – 34.0
Ni: 63.0 – 70.0
Fe: 2.5 max

Physical Properties

Density: 0.318 lb/in3, (8.8 g/cm3)

Modulus of Elasticity (E):
At 70°F (20°C): 26.0 x 103 ksi (179 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  9.5 x 103 ksi (65.5 GPa)

Coefficient of Expansion:
8.8 microinches/in-oF (70-600oF)
15.7 µm/m-°C (20-300°C)

Electrical Resistivity: 20.1 µohm-in, (51.1 µohm-cm)

Thermal Conductivity:
151 Btu-in/ft2hr-°F
21.8 W/m-K

Applicable Specifications

Strip and Foil: AMS 4544, ASME SB-127, ASTM B127, QQ-N-281

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1600-1800°F (870-980°C)
    • Tensile Strength: 70 – 85 ksi (480-585 MPa)
    • Suggested Operating Conditions: -300°F to 500°F (-184°C to 260°C)
  • Spring Temper
    • Heat Treatment: (Stress relieve as needed)
    • Tensile Strength: 120 ksi
    • Suggested Operating Conditions: -300°F to 500°F (-184°C to 260°C)

For further information Contact:

Contact Us
Phone: 1 888 843 2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr.
Elgin, IL 60123 USA

Limitation of Liability and Disclaimer of Warranty:

  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
  • Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.