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R30003 Cobalt vs. Grade 363 Molybdenum

R30003 cobalt belongs to the cobalt alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 19 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 R30003 cobalt and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
310
Elongation at Break, % 10 to 73
6.2 to 11
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 83
120
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
580 to 720
Tensile Strength: Yield (Proof), MPa 510 to 1090
350 to 620

Thermal Properties

Latent Heat of Fusion, J/g 310
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 8.0
28
Embodied Energy, MJ/kg 110
330
Embodied Water, L/kg 400
360

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
200 to 630
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 32 to 57
16 to 20
Strength to Weight: Bending, points 26 to 38
15 to 17
Thermal Shock Resistance, points 26 to 45
19 to 24

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0.010 to 0.030
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 39 to 41
0
Iron (Fe), % 10 to 20.5
0 to 0.010
Manganese (Mn), % 1.5 to 2.5
0
Molybdenum (Mo), % 6.0 to 8.0
99.3 to 99.5
Nickel (Ni), % 14 to 16
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0030
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
0 to 0.010
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.4 to 0.55
Zirconium (Zr), % 0
0.060 to 0.12