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R31233 Cobalt vs. Grade 363 Molybdenum

R31233 cobalt belongs to the cobalt alloys classification, while grade 363 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is grade 363 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
310
Elongation at Break, % 17
6.2 to 11
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 85
120
Tensile Strength: Ultimate (UTS), MPa 1020
580 to 720
Tensile Strength: Yield (Proof), MPa 420
350 to 620

Thermal Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.6
10
Embodied Carbon, kg CO2/kg material 8.4
28
Embodied Energy, MJ/kg 110
330
Embodied Water, L/kg 480
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
43 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 410
200 to 630
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 33
16 to 20
Strength to Weight: Bending, points 26
15 to 17
Thermal Shock Resistance, points 25
19 to 24

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.010 to 0.030
Chromium (Cr), % 23.5 to 27.5
0
Cobalt (Co), % 44.7 to 63.3
0
Iron (Fe), % 1.0 to 5.0
0 to 0.010
Manganese (Mn), % 0.1 to 1.5
0
Molybdenum (Mo), % 4.0 to 6.0
99.3 to 99.5
Nickel (Ni), % 7.0 to 11
0 to 0.0020
Nitrogen (N), % 0.030 to 0.12
0 to 0.0020
Oxygen (O), % 0
0 to 0.0030
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.050 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0.4 to 0.55
Tungsten (W), % 1.0 to 3.0
0
Zirconium (Zr), % 0
0.060 to 0.12