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Grade 361 Molybdenum vs. R30006 Cobalt

Grade 361 molybdenum belongs to the otherwise unclassified metals classification, while R30006 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 361 molybdenum and the bottom bar is R30006 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
85
Tensile Strength: Ultimate (UTS), MPa 620
900
Tensile Strength: Yield (Proof), MPa 530
540

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Specific Heat Capacity, J/kg-K 250
450
Thermal Expansion, µm/m-K 7.0
11

Otherwise Unclassified Properties

Density, g/cm3 10
8.6
Embodied Carbon, kg CO2/kg material 28
7.8
Embodied Energy, MJ/kg 330
110
Embodied Water, L/kg 360
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 450
670
Stiffness to Weight: Axial, points 17
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 17
29
Strength to Weight: Bending, points 16
24
Thermal Shock Resistance, points 21
26

Alloy Composition

Carbon (C), % 0 to 0.010
0.9 to 1.4
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
48.6 to 68.1
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
4.0 to 6.0