Grade 365 Molybdenum vs. R30035 Cobalt

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while R30035 cobalt belongs to the cobalt alloys. There are 20 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 365 molybdenum and the bottom bar is R30035 cobalt.

Grade 365 Molybdenum UNS R30035 (2.4999) Co-Ni-Cr-Mo Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		310
Elastic (Young's, Tensile) Modulus, GPa		220 to 230

Elongation at Break, %		6.3
Elongation at Break, %		9.0 to 46

Poisson's Ratio		0.31
Poisson's Ratio		0.29

Shear Modulus, GPa		120
Shear Modulus, GPa		84 to 89

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		900 to 1900

Tensile Strength: Yield (Proof), MPa		530
Tensile Strength: Yield (Proof), MPa		300 to 1650

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		440

Thermal Expansion, µm/m-K		7.0
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		8.7

Embodied Carbon, kg CO₂/kg material		28
Embodied Carbon, kg CO₂/kg material		10

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		140

Embodied Water, L/kg		360
Embodied Water, L/kg		410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		37
Resilience: Ultimate (Unit Rupture Work), MJ/m³		160 to 320

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		210 to 5920

Stiffness to Weight: Axial, points		17
Stiffness to Weight: Axial, points		14 to 15

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		23 to 24

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		29 to 61

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		24 to 39

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		23 to 46

Alloy Composition

Boron (B), %		0
Boron (B), %		0 to 0.015

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.025

Chromium (Cr), %		0
Chromium (Cr), %		19 to 21

Cobalt (Co), %		0
Cobalt (Co), %		29.1 to 39

Iron (Fe), %		0 to 0.010
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.15

Molybdenum (Mo), %		99.9 to 100
Molybdenum (Mo), %		9.0 to 10.5

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		33 to 37

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 0.015

Silicon (Si), %		0 to 0.010
Silicon (Si), %		0 to 0.15

Sulfur (S), %		0
Sulfur (S), %		0 to 0.010

Titanium (Ti), %		0
Titanium (Ti), %		0 to 1.0