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R31539 Cobalt vs. Type 3 Niobium

R31539 cobalt belongs to the cobalt alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is Type 3 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Elongation at Break, % 13 to 22
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 86
38
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
220
Tensile Strength: Yield (Proof), MPa 590 to 940
140

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Specific Heat Capacity, J/kg-K 450
270
Thermal Conductivity, W/m-K 13
42
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Water, L/kg 530
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
44
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
93
Stiffness to Weight: Axial, points 15
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 33 to 44
7.2
Strength to Weight: Bending, points 27 to 32
9.5
Thermal Diffusivity, mm2/s 3.5
18
Thermal Shock Resistance, points 24 to 32
21

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.010
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.75
0 to 0.0050
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.010
Nickel (Ni), % 0 to 1.0
0 to 0.0050
Niobium (Nb), % 0
98.6 to 99.2
Nitrogen (N), % 0 to 0.25
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zirconium (Zr), % 0
0.8 to 1.2