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R05400 Tantalum vs. R30001 Cobalt

R05400 tantalum 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 (11, in this case) are not shown.

For each property being compared, the top bar is R05400 tantalum and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 1.1 to 28
1.0
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 69
86
Tensile Strength: Ultimate (UTS), MPa 210 to 540
620

Thermal Properties

Latent Heat of Fusion, J/g 140
310
Specific Heat Capacity, J/kg-K 140
430
Thermal Conductivity, W/m-K 59
15
Thermal Expansion, µm/m-K 6.5
11

Otherwise Unclassified Properties

Density, g/cm3 17
9.0
Embodied Water, L/kg 650
460

Common Calculations

Stiffness to Weight: Axial, points 6.2
14
Stiffness to Weight: Bending, points 11
22
Strength to Weight: Axial, points 3.6 to 9.0
19
Strength to Weight: Bending, points 4.8 to 8.8
18
Thermal Diffusivity, mm2/s 25
3.7
Thermal Shock Resistance, points 13 to 32
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
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 3.0
Molybdenum (Mo), % 0 to 0.020
0 to 1.0
Nickel (Ni), % 0 to 0.010
0 to 3.0
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.030
0
Silicon (Si), % 0 to 0.0050
0 to 2.0
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
11 to 13