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R31538 Cobalt vs. Grade 360 Molybdenum

R31538 cobalt belongs to the cobalt alloys classification, while grade 360 molybdenum belongs to the otherwise unclassified metals. 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 R31538 cobalt and the bottom bar is grade 360 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
310
Elongation at Break, % 13 to 23
6.3 to 17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
120
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
430 to 620
Tensile Strength: Yield (Proof), MPa 580 to 930
270 to 530

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
37 to 64
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
120 to 450
Stiffness to Weight: Axial, points 15
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 34 to 45
12 to 17
Strength to Weight: Bending, points 27 to 32
12 to 16
Thermal Shock Resistance, points 25 to 33
14 to 21

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.030
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Iron (Fe), % 0 to 0.75
0 to 0.010
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
99.9 to 100
Nickel (Ni), % 0 to 1.0
0 to 0.0020
Nitrogen (N), % 0 to 0.25
0 to 0.0020
Oxygen (O), % 0
0 to 0.0015
Silicon (Si), % 0 to 1.0
0 to 0.010