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Grade 361 Molybdenum vs. R30001 Cobalt

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while R30001 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 361 molybdenum and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 310
220
Elongation at Break, % 6.3
1.0
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 120
86
Tensile Strength: Ultimate (UTS), MPa 620
620

Thermal Properties

Latent Heat of Fusion, J/g 370
310
Specific Heat Capacity, J/kg-K 250
430
Thermal Expansion, µm/m-K 7.0
11

Otherwise Unclassified Properties

Density, g/cm3 10
9.0
Embodied Carbon, kg CO2/kg material 28
8.9
Embodied Energy, MJ/kg 330
130
Embodied Water, L/kg 360
460

Common Calculations

Stiffness to Weight: Axial, points 17
14
Stiffness to Weight: Bending, points 22
22
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 16
18
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0 to 0.010
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Iron (Fe), % 0 to 0.010
0 to 3.0
Molybdenum (Mo), % 99.9 to 100
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 3.0
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0070
0
Silicon (Si), % 0 to 0.010
0 to 2.0
Tungsten (W), % 0
11 to 13