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R30006 Cobalt vs. Type 4 Niobium

R30006 cobalt belongs to the cobalt alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
23
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 85
38
Tensile Strength: Ultimate (UTS), MPa 900
220
Tensile Strength: Yield (Proof), MPa 540
140

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Specific Heat Capacity, J/kg-K 450
270
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 11
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.6
Embodied Water, L/kg 500
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
44
Resilience: Unit (Modulus of Resilience), kJ/m3 670
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 29
7.2
Strength to Weight: Bending, points 24
9.5
Thermal Diffusivity, mm2/s 3.9
18
Thermal Shock Resistance, points 26
21

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.010
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 3.0
0 to 0.010
Molybdenum (Mo), % 0 to 1.0
0 to 0.050
Nickel (Ni), % 0 to 3.0
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 4.0 to 6.0
0 to 0.050
Zirconium (Zr), % 0
0.8 to 1.2