Grade 366 Molybdenum vs. Type 3 Niobium

Both grade 366 molybdenum and Type 3 niobium are otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 366 molybdenum and the bottom bar is Type 3 niobium.

Grade 366 Molybdenum Type 3 (Alloyed Reactor Grade, R04251) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		300
Elastic (Young's, Tensile) Modulus, GPa		100

Elongation at Break, %		2.2
Elongation at Break, %		23

Poisson's Ratio		0.3
Poisson's Ratio		0.4

Shear Modulus, GPa		120
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		580
Tensile Strength: Ultimate (UTS), MPa		220

Tensile Strength: Yield (Proof), MPa		470
Tensile Strength: Yield (Proof), MPa		140

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		310

Specific Heat Capacity, J/kg-K		210
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		7.6
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		12
Density, g/cm³		8.6

Embodied Water, L/kg		300
Embodied Water, L/kg		160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		12
Resilience: Ultimate (Unit Rupture Work), MJ/m³		44

Resilience: Unit (Modulus of Resilience), kJ/m³		370
Resilience: Unit (Modulus of Resilience), kJ/m³		93

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		13
Strength to Weight: Axial, points		7.2

Strength to Weight: Bending, points		13
Strength to Weight: Bending, points		9.5

Thermal Shock Resistance, points		18
Thermal Shock Resistance, points		21

Alloy Composition

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.010

Hafnium (Hf), %		0
Hafnium (Hf), %		0 to 0.020

Hydrogen (H), %		0
Hydrogen (H), %		0 to 0.0015

Iron (Fe), %		0 to 0.010
Iron (Fe), %		0 to 0.0050

Molybdenum (Mo), %		66.9 to 73
Molybdenum (Mo), %		0 to 0.010

Nickel (Ni), %		0 to 0.0020
Nickel (Ni), %		0 to 0.0050

Niobium (Nb), %		0
Niobium (Nb), %		98.6 to 99.2

Nitrogen (N), %		0 to 0.0020
Nitrogen (N), %		0 to 0.010

Oxygen (O), %		0 to 0.0025
Oxygen (O), %		0 to 0.015

Silicon (Si), %		0 to 0.010
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.1

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.020

Tungsten (W), %		27 to 33
Tungsten (W), %		0 to 0.030

Zirconium (Zr), %		0
Zirconium (Zr), %		0.8 to 1.2