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Monel R-405 (N04405)

Monel R-405 is a nickel alloy formulated for primary forming into wrought products. N04405 is the UNS number for this material. Monel R-405 is the common industry name. It can have a moderately low tensile strength and has a moderately low embodied energy among wrought nickels.

The properties of Monel R-405 include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare Monel R-405 to: wrought nickels (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

160 GPa 24 x 106 psi

Elongation at Break

9.1 to 39 %

Fatigue Strength

210 to 250 MPa 30 to 37 x 103 psi

Poisson's Ratio


Shear Modulus

62 GPa 8.9 x 106 psi

Shear Strength

350 to 370 MPa 51 to 54 x 103 psi

Tensile Strength: Ultimate (UTS)

540 to 630 MPa 78 to 91 x 103 psi

Tensile Strength: Yield (Proof)

190 to 350 MPa 28 to 50 x 103 psi

Thermal Properties

Curie Temperature

18 °C 65 °F

Latent Heat of Fusion

270 J/g

Maximum Temperature: Mechanical

900 °C 1650 °F

Melting Completion (Liquidus)

1350 °C 2460 °F

Melting Onset (Solidus)

1300 °C 2370 °F

Specific Heat Capacity

430 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

23 W/m-K 13 BTU/h-ft-°F

Thermal Expansion

14 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

3.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

50 % relative


8.9 g/cm3 550 lb/ft3

Embodied Carbon

7.9 kg CO2/kg material

Embodied Energy

110 MJ/kg 48 x 103 BTU/lb

Embodied Water

250 L/kg 30 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

49 to 170 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 to 370 kJ/m3

Stiffness to Weight: Axial

10 points

Stiffness to Weight: Bending

21 points

Strength to Weight: Axial

17 to 20 points

Strength to Weight: Bending

17 to 18 points

Thermal Diffusivity

5.9 mm2/s

Thermal Shock Resistance

17 to 20 points

Alloy Composition

Nickel (Ni)Ni 63 to 72
Copper (Cu)Cu 28 to 34
Iron (Fe)Fe 0 to 2.5
Manganese (Mn)Mn 0 to 2.0
Silicon (Si)Si 0 to 0.5
Carbon (C)C 0 to 0.3
Sulfur (S)S 0.025 to 0.060

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B164: Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire

Welding Metallurgy and Weldability of Nickel-Base Alloys, John C. Lippold et al., 2009

Metallic Materials: Physical, Mechanical, and Corrosion Properties, Philip A. Schweitzer, 2003

ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, Joseph R. Davis (editor), 2000

Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971

Nickel Alloys, Ulrich Heubner (editor), 1998