Grade 365 Molybdenum vs. AWS BCo-1

Grade 365 molybdenum belongs to the otherwise unclassified metals classification, while AWS BCo-1 belongs to the cobalt alloys. There are 16 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 AWS BCo-1.

Grade 365 Molybdenum AWS BCo-1 (R39001) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		310
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.31
Poisson's Ratio		0.3

Shear Modulus, GPa		120
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		420

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		7.0
Thermal Expansion, µm/m-K		12

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		8.0

Embodied Energy, MJ/kg		330
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		360
Embodied Water, L/kg		430

Common Calculations

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

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

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		24

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		22

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

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.050

Boron (B), %		0
Boron (B), %		0.7 to 0.9

Carbon (C), %		0 to 0.010
Carbon (C), %		0.35 to 0.45

Chromium (Cr), %		0
Chromium (Cr), %		18 to 20

Cobalt (Co), %		0
Cobalt (Co), %		46 to 54

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

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

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		16 to 18

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 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		0 to 0.010
Silicon (Si), %		7.5 to 8.5

Sulfur (S), %		0
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.050

Tungsten (W), %		0
Tungsten (W), %		3.5 to 4.5

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5