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R31539 Cobalt vs. Grade 363 Molybdenum

R31539 cobalt belongs to the cobalt alloys classification, while grade 363 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 R31539 cobalt and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
310
Elongation at Break, % 13 to 22
6.2 to 11
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
120
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
580 to 720
Tensile Strength: Yield (Proof), MPa 590 to 940
350 to 620

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 8.2
28
Embodied Energy, MJ/kg 110
330
Embodied Water, L/kg 530
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
43 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
200 to 630
Stiffness to Weight: Axial, points 15
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 33 to 44
16 to 20
Strength to Weight: Bending, points 27 to 32
15 to 17
Thermal Shock Resistance, points 24 to 32
19 to 24

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0.010 to 0.030
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
0 to 0.010
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
99.3 to 99.5
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 0.0030
Silicon (Si), % 0 to 1.0
0 to 0.010
Titanium (Ti), % 0
0.4 to 0.55
Zirconium (Zr), % 0
0.060 to 0.12