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R05400 Tantalum vs. ACI-ASTM CB7Cu-2 Steel

R05400 tantalum belongs to the otherwise unclassified metals classification, while ACI-ASTM CB7Cu-2 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, 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 ACI-ASTM CB7Cu-2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 1.1 to 28
5.7 to 11
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 69
75
Tensile Strength: Ultimate (UTS), MPa 210 to 540
960 to 1350
Tensile Strength: Yield (Proof), MPa 140 to 390
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 140
280
Specific Heat Capacity, J/kg-K 140
480
Thermal Conductivity, W/m-K 59
17
Thermal Expansion, µm/m-K 6.5
11

Otherwise Unclassified Properties

Density, g/cm3 17
7.8
Embodied Water, L/kg 650
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
1510 to 3600
Stiffness to Weight: Axial, points 6.2
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 3.6 to 9.0
34 to 48
Strength to Weight: Bending, points 4.8 to 8.8
28 to 35
Thermal Diffusivity, mm2/s 25
4.6
Thermal Shock Resistance, points 13 to 32
32 to 45

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.070
Chromium (Cr), % 0
14 to 15.5
Copper (Cu), % 0
2.5 to 3.2
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
73.6 to 79
Manganese (Mn), % 0
0 to 0.7
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
4.5 to 5.5
Niobium (Nb), % 0 to 0.1
0 to 0.35
Nitrogen (N), % 0 to 0.010
0 to 0.050
Oxygen (O), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.0050
0 to 1.0
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
0