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R05400 Tantalum vs. R30605 Cobalt

R05400 tantalum belongs to the otherwise unclassified metals classification, while R30605 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R05400 tantalum and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 1.1 to 28
34
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 69
81
Tensile Strength: Ultimate (UTS), MPa 210 to 540
1130 to 1900
Tensile Strength: Yield (Proof), MPa 140 to 390
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 140
290
Specific Heat Capacity, J/kg-K 140
410
Thermal Conductivity, W/m-K 59
9.6
Thermal Expansion, µm/m-K 6.5
12

Otherwise Unclassified Properties

Density, g/cm3 17
9.6
Embodied Water, L/kg 650
450

Common Calculations

Stiffness to Weight: Axial, points 6.2
12
Stiffness to Weight: Bending, points 11
21
Strength to Weight: Axial, points 3.6 to 9.0
33 to 55
Strength to Weight: Bending, points 4.8 to 8.8
25 to 36
Thermal Diffusivity, mm2/s 25
2.5
Thermal Shock Resistance, points 13 to 32
31 to 52

Alloy Composition

Carbon (C), % 0 to 0.010
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 3.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
9.0 to 11
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 0.040
Silicon (Si), % 0 to 0.0050
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
14 to 16

Comparable Variants