R30001 Cobalt vs. Type 2 Niobium

R30001 cobalt belongs to the cobalt alloys classification, while Type 2 niobium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is Type 2 niobium.

UNS R30001 Co-Cr-W Alloy Type 2 (Unalloyed Commercial Grade, R04210) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		110

Elongation at Break, %		1.0
Elongation at Break, %		29

Poisson's Ratio		0.28
Poisson's Ratio		0.4

Shear Modulus, GPa		86
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		140

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		430
Specific Heat Capacity, J/kg-K		270

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		52

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		8.6

Embodied Water, L/kg		460
Embodied Water, L/kg		160

Common Calculations

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

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		4.6

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		7.1

Thermal Diffusivity, mm²/s		3.7
Thermal Diffusivity, mm²/s		23

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		13

Alloy Composition

Carbon (C), %		2.0 to 3.0
Carbon (C), %		0 to 0.010

Chromium (Cr), %		28 to 32
Chromium (Cr), %		0

Cobalt (Co), %		43 to 59
Cobalt (Co), %		0

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

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

Iron (Fe), %		0 to 3.0
Iron (Fe), %		0 to 0.010

Molybdenum (Mo), %		0 to 1.0
Molybdenum (Mo), %		0 to 0.020

Nickel (Ni), %		0 to 3.0
Nickel (Ni), %		0 to 0.0050

Niobium (Nb), %		0
Niobium (Nb), %		99.5 to 100

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.025

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.3

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.030

Tungsten (W), %		11 to 13
Tungsten (W), %		0 to 0.050

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.020