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Grade 363 Molybdenum vs. R30155 Cobalt

Grade 363 molybdenum belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is grade 363 molybdenum and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
210
Elongation at Break, % 6.2 to 11
34
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 120
81
Tensile Strength: Ultimate (UTS), MPa 580 to 720
850
Tensile Strength: Yield (Proof), MPa 350 to 620
390

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Specific Heat Capacity, J/kg-K 250
450
Thermal Expansion, µm/m-K 7.0
14

Otherwise Unclassified Properties

Density, g/cm3 10
8.5
Embodied Carbon, kg CO2/kg material 28
9.7
Embodied Energy, MJ/kg 330
150
Embodied Water, L/kg 360
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 43 to 57
230
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 630
370
Stiffness to Weight: Axial, points 17
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 16 to 20
28
Strength to Weight: Bending, points 15 to 17
24
Thermal Shock Resistance, points 19 to 24
21

Alloy Composition

Carbon (C), % 0.010 to 0.030
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 0 to 0.010
24.3 to 36.2
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 99.3 to 99.5
2.5 to 3.5
Nickel (Ni), % 0 to 0.0020
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0 to 0.0020
0 to 0.2
Oxygen (O), % 0 to 0.0030
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Titanium (Ti), % 0.4 to 0.55
0
Tungsten (W), % 0
2.0 to 3.0
Zirconium (Zr), % 0.060 to 0.12
0