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R30003 Cobalt vs. R05400 Tantalum

R30003 cobalt belongs to the cobalt alloys classification, while R05400 tantalum belongs to the otherwise unclassified metals. There are 19 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 R30003 cobalt and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 10 to 73
1.1 to 28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 83
69
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
210 to 540
Tensile Strength: Yield (Proof), MPa 510 to 1090
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 310
140
Specific Heat Capacity, J/kg-K 450
140
Thermal Conductivity, W/m-K 13
59
Thermal Expansion, µm/m-K 13
6.5

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
50 to 420
Stiffness to Weight: Axial, points 14
6.2
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 32 to 57
3.6 to 9.0
Strength to Weight: Bending, points 26 to 38
4.8 to 8.8
Thermal Diffusivity, mm2/s 3.3
25
Thermal Shock Resistance, points 26 to 45
13 to 32

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0 to 0.010
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 39 to 41
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 10 to 20.5
0 to 0.010
Manganese (Mn), % 1.5 to 2.5
0
Molybdenum (Mo), % 6.0 to 8.0
0 to 0.020
Nickel (Ni), % 14 to 16
0 to 0.010
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
0 to 0.0050
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0
99.7 to 100
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0 to 0.050

Comparable Variants