Grade 365 Molybdenum vs. G-CoCr28 Cobalt

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while G-CoCr28 cobalt belongs to the cobalt alloys. 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 grade 365 molybdenum and the bottom bar is G-CoCr28 cobalt.

Grade 365 Molybdenum G-CoCr28 (2.4778) Cobalt-Chromium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		310
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		6.3
Elongation at Break, %		6.7

Poisson's Ratio		0.31
Poisson's Ratio		0.28

Shear Modulus, GPa		120
Shear Modulus, GPa		83

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		560

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		260

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		7.0
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		8.1

Embodied Carbon, kg CO₂/kg material		28
Embodied Carbon, kg CO₂/kg material		6.2

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		84

Embodied Water, L/kg		360
Embodied Water, L/kg		440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		31

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		160

Stiffness to Weight: Axial, points		17
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		19

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		14

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0.050 to 0.25

Chromium (Cr), %		0
Chromium (Cr), %		27 to 30

Cobalt (Co), %		0
Cobalt (Co), %		48 to 52

Iron (Fe), %		0 to 0.010
Iron (Fe), %		9.7 to 24.5

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.5

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		0 to 0.5

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		0 to 4.0

Niobium (Nb), %		0
Niobium (Nb), %		0 to 0.5

Nitrogen (N), %		0 to 0.0020
Nitrogen (N), %		0

Oxygen (O), %		0 to 0.0015
Oxygen (O), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.010
Silicon (Si), %		0.5 to 1.5

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030