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R05400 Tantalum vs. AWS BCo-1

R05400 tantalum belongs to the otherwise unclassified metals classification, while AWS BCo-1 belongs to the cobalt alloys. There are 14 material properties with values for both materials. Properties with values for just one material (11, 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 AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.34
0.3
Shear Modulus, GPa 69
78
Tensile Strength: Ultimate (UTS), MPa 210 to 540
700

Thermal Properties

Latent Heat of Fusion, J/g 140
420
Specific Heat Capacity, J/kg-K 140
480
Thermal Expansion, µm/m-K 6.5
12

Otherwise Unclassified Properties

Density, g/cm3 17
8.1
Embodied Water, L/kg 650
430

Common Calculations

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
24
Strength to Weight: Bending, points 4.8 to 8.8
22
Thermal Shock Resistance, points 13 to 32
21

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0 to 0.010
0.35 to 0.45
Chromium (Cr), % 0
18 to 20
Cobalt (Co), % 0
46 to 54
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 1.0
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
16 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 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.0050
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0 to 0.050
Tungsten (W), % 0 to 0.050
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5