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R30075 Cobalt vs. Grade 365 Molybdenum

R30075 cobalt belongs to the cobalt alloys classification, while grade 365 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is grade 365 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
310
Elongation at Break, % 12
6.3
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 82 to 98
120
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
620
Tensile Strength: Yield (Proof), MPa 480 to 840
530

Thermal Properties

Latent Heat of Fusion, J/g 320
370
Specific Heat Capacity, J/kg-K 450
250
Thermal Expansion, µm/m-K 12
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 84 to 140
37
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
450
Stiffness to Weight: Axial, points 14 to 17
17
Stiffness to Weight: Bending, points 24 to 25
22
Strength to Weight: Axial, points 26 to 42
17
Strength to Weight: Bending, points 22 to 31
16
Thermal Shock Resistance, points 21 to 29
21

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.010
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
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 0.5
0 to 0.0020
Nitrogen (N), % 0 to 0.25
0 to 0.0020
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0