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Grade 365 Molybdenum vs. R30035 Cobalt

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while R30035 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 365 molybdenum and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
220 to 230
Elongation at Break, % 6.3
9.0 to 46
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 120
84 to 89
Tensile Strength: Ultimate (UTS), MPa 620
900 to 1900
Tensile Strength: Yield (Proof), MPa 530
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Specific Heat Capacity, J/kg-K 250
440
Thermal Expansion, µm/m-K 7.0
13

Otherwise Unclassified Properties

Density, g/cm3 10
8.7
Embodied Carbon, kg CO2/kg material 28
10
Embodied Energy, MJ/kg 330
140
Embodied Water, L/kg 360
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 450
210 to 5920
Stiffness to Weight: Axial, points 17
14 to 15
Stiffness to Weight: Bending, points 22
23 to 24
Strength to Weight: Axial, points 17
29 to 61
Strength to Weight: Bending, points 16
24 to 39
Thermal Shock Resistance, points 21
23 to 46

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.010
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Iron (Fe), % 0 to 0.010
0 to 1.0
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 99.9 to 100
9.0 to 10.5
Nickel (Ni), % 0 to 0.0020
33 to 37
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0015
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0 to 0.15
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 1.0