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R05400 Tantalum vs. SAE-AISI A7 Steel

R05400 tantalum belongs to the otherwise unclassified metals classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 16 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 SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 69
72
Tensile Strength: Ultimate (UTS), MPa 210 to 540
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 140
260
Specific Heat Capacity, J/kg-K 140
470
Thermal Conductivity, W/m-K 59
37
Thermal Expansion, µm/m-K 6.5
12

Otherwise Unclassified Properties

Density, g/cm3 17
7.7
Embodied Water, L/kg 650
100

Common Calculations

Stiffness to Weight: Axial, points 6.2
13
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 3.6 to 9.0
29 to 77
Strength to Weight: Bending, points 4.8 to 8.8
25 to 48
Thermal Diffusivity, mm2/s 25
10
Thermal Shock Resistance, points 13 to 32
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.010
2.0 to 2.9
Chromium (Cr), % 0
5.0 to 5.8
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
81.4 to 87.7
Manganese (Mn), % 0
0 to 0.8
Molybdenum (Mo), % 0 to 0.020
0.9 to 1.4
Nickel (Ni), % 0 to 0.010
0 to 0.3
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 0.030
Silicon (Si), % 0 to 0.0050
0 to 0.5
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
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2

Comparable Variants