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Grade 361 Molybdenum vs. R30003 Cobalt

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while R30003 cobalt belongs to the cobalt alloys. 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 grade 361 molybdenum and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
210
Elongation at Break, % 6.3
10 to 73
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 120
83
Tensile Strength: Ultimate (UTS), MPa 620
970 to 1720
Tensile Strength: Yield (Proof), MPa 530
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 370
310
Specific Heat Capacity, J/kg-K 250
450
Thermal Expansion, µm/m-K 7.0
13

Otherwise Unclassified Properties

Density, g/cm3 10
8.4
Embodied Carbon, kg CO2/kg material 28
8.0
Embodied Energy, MJ/kg 330
110
Embodied Water, L/kg 360
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 450
600 to 2790
Stiffness to Weight: Axial, points 17
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 17
32 to 57
Strength to Weight: Bending, points 16
26 to 38
Thermal Shock Resistance, points 21
26 to 45

Alloy Composition

Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.010
0 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Iron (Fe), % 0 to 0.010
10 to 20.5
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 99.9 to 100
6.0 to 8.0
Nickel (Ni), % 0 to 0.0050
14 to 16
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0070
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0 to 1.2
Sulfur (S), % 0
0 to 0.015