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Monel 400 vs. R31539 Cobalt

Monel 400 belongs to the nickel alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Monel 400 and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
220
Elongation at Break, % 20 to 40
13 to 22
Fatigue Strength, MPa 230 to 290
310 to 480
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 62
86
Tensile Strength: Ultimate (UTS), MPa 540 to 780
1000 to 1340
Tensile Strength: Yield (Proof), MPa 210 to 590
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1350
1360
Melting Onset (Solidus), °C 1300
1290
Specific Heat Capacity, J/kg-K 430
450
Thermal Conductivity, W/m-K 23
13
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.4
Embodied Carbon, kg CO2/kg material 7.9
8.2
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 250
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1080
780 to 2000
Stiffness to Weight: Axial, points 10
15
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 17 to 25
33 to 44
Strength to Weight: Bending, points 17 to 21
27 to 32
Thermal Diffusivity, mm2/s 6.1
3.5
Thermal Shock Resistance, points 17 to 25
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0 to 0.3
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 28 to 34
0
Iron (Fe), % 0 to 2.5
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 63 to 72
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.024
0

Comparable Variants