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R05400 Tantalum vs. R30816 Cobalt

R05400 tantalum belongs to the otherwise unclassified metals classification, while R30816 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R05400 tantalum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 1.1 to 28
23
Poisson's Ratio 0.34
0.3
Shear Modulus, GPa 69
81
Tensile Strength: Ultimate (UTS), MPa 210 to 540
1020
Tensile Strength: Yield (Proof), MPa 140 to 390
460

Thermal Properties

Latent Heat of Fusion, J/g 140
300
Specific Heat Capacity, J/kg-K 140
420
Thermal Conductivity, W/m-K 59
13
Thermal Expansion, µm/m-K 6.5
12

Otherwise Unclassified Properties

Density, g/cm3 17
9.1
Embodied Water, L/kg 650
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
190
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
510
Stiffness to Weight: Axial, points 6.2
13
Stiffness to Weight: Bending, points 11
22
Strength to Weight: Axial, points 3.6 to 9.0
31
Strength to Weight: Bending, points 4.8 to 8.8
25
Thermal Diffusivity, mm2/s 25
3.3
Thermal Shock Resistance, points 13 to 32
28

Alloy Composition

Carbon (C), % 0 to 0.010
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.020
3.5 to 4.5
Nickel (Ni), % 0 to 0.010
19 to 21
Niobium (Nb), % 0 to 0.1
3.5 to 4.5
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 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 99.7 to 100
3.5 to 4.5
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
3.5 to 4.5