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Grade 365 Molybdenum vs. R30075 Cobalt

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while R30075 cobalt belongs to the cobalt alloys. 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 grade 365 molybdenum and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

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
12

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
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 450
560 to 1410
Stiffness to Weight: Axial, points 17
14 to 17
Stiffness to Weight: Bending, points 22
24 to 25
Strength to Weight: Axial, points 17
26 to 42
Strength to Weight: Bending, points 16
22 to 31
Thermal Shock Resistance, points 21
21 to 29

Alloy Composition

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