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Monel R-405 vs. R31233 Cobalt

Monel R-405 belongs to the nickel alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is Monel R-405 and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
220
Elongation at Break, % 9.1 to 39
17
Fatigue Strength, MPa 210 to 250
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 62
85
Tensile Strength: Ultimate (UTS), MPa 540 to 630
1020
Tensile Strength: Yield (Proof), MPa 190 to 350
420

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1350
1350
Melting Onset (Solidus), °C 1300
1330
Specific Heat Capacity, J/kg-K 430
440
Thermal Conductivity, W/m-K 23
12
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.6
Embodied Carbon, kg CO2/kg material 7.9
8.4
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 250
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49 to 170
140
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 370
410
Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 17 to 20
33
Strength to Weight: Bending, points 17 to 18
26
Thermal Diffusivity, mm2/s 5.9
3.2
Thermal Shock Resistance, points 17 to 20
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.3
0.020 to 0.1
Chromium (Cr), % 0
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Copper (Cu), % 28 to 34
0
Iron (Fe), % 0 to 2.5
1.0 to 5.0
Manganese (Mn), % 0 to 2.0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 63 to 72
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0.050 to 1.0
Sulfur (S), % 0.025 to 0.060
0 to 0.020
Tungsten (W), % 0
1.0 to 3.0