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Type 4 Niobium vs. R30001 Cobalt

Type 4 niobium belongs to the otherwise unclassified metals classification, while R30001 cobalt belongs to the cobalt alloys. 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 Type 4 niobium and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 23
1.0
Poisson's Ratio 0.4
0.28
Shear Modulus, GPa 38
86
Tensile Strength: Ultimate (UTS), MPa 220
620

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Specific Heat Capacity, J/kg-K 270
430
Thermal Conductivity, W/m-K 42
15
Thermal Expansion, µm/m-K 7.3
11

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.0
Embodied Water, L/kg 160
460

Common Calculations

Stiffness to Weight: Axial, points 6.8
14
Stiffness to Weight: Bending, points 18
22
Strength to Weight: Axial, points 7.2
19
Strength to Weight: Bending, points 9.5
18
Thermal Diffusivity, mm2/s 18
3.7
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0 to 0.010
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 3.0
Molybdenum (Mo), % 0 to 0.050
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 3.0
Niobium (Nb), % 98.1 to 99.2
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.025
0
Silicon (Si), % 0 to 0.0050
0 to 2.0
Tantalum (Ta), % 0 to 0.5
0
Titanium (Ti), % 0 to 0.020
0
Tungsten (W), % 0 to 0.050
11 to 13
Zirconium (Zr), % 0.8 to 1.2
0