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R05400 Tantalum vs. R30008 Cobalt

R05400 tantalum belongs to the otherwise unclassified metals classification, while R30008 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R05400 tantalum and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 1.1 to 28
1.1 to 73
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 69
83
Tensile Strength: Ultimate (UTS), MPa 210 to 540
950 to 1700
Tensile Strength: Yield (Proof), MPa 140 to 390
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 140
320
Specific Heat Capacity, J/kg-K 140
450
Thermal Expansion, µm/m-K 6.5
13

Otherwise Unclassified Properties

Density, g/cm3 17
8.4
Embodied Water, L/kg 650
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
590 to 2720
Stiffness to Weight: Axial, points 6.2
14
Stiffness to Weight: Bending, points 11
24
Strength to Weight: Axial, points 3.6 to 9.0
31 to 56
Strength to Weight: Bending, points 4.8 to 8.8
25 to 37
Thermal Shock Resistance, points 13 to 32
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0 to 0.010
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
7.6 to 20
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.020
6.5 to 7.5
Nickel (Ni), % 0 to 0.010
15 to 18
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.0050
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
0

Comparable Variants