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Grade 361 Molybdenum vs. R31537 Cobalt

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while R31537 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 361 molybdenum and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
220
Elongation at Break, % 6.3
14 to 23
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 120
87
Tensile Strength: Ultimate (UTS), MPa 620
1000 to 1340
Tensile Strength: Yield (Proof), MPa 530
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Specific Heat Capacity, J/kg-K 250
450
Thermal Expansion, µm/m-K 7.0
13

Otherwise Unclassified Properties

Density, g/cm3 10
8.4
Embodied Carbon, kg CO2/kg material 28
8.1
Embodied Energy, MJ/kg 330
110
Embodied Water, L/kg 360
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 450
780 to 1990
Stiffness to Weight: Axial, points 17
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 17
33 to 44
Strength to Weight: Bending, points 16
26 to 32
Thermal Shock Resistance, points 21
24 to 32

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Iron (Fe), % 0 to 0.010
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 99.9 to 100
5.0 to 7.0
Nickel (Ni), % 0 to 0.0050
0 to 1.0
Nitrogen (N), % 0 to 0.0020
0 to 0.25
Oxygen (O), % 0 to 0.0070
0
Silicon (Si), % 0 to 0.010
0 to 1.0