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R05400 Tantalum vs. 7050 Aluminum

R05400 tantalum belongs to the otherwise unclassified metals classification, while 7050 aluminum belongs to the aluminum 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 7050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 1.1 to 28
2.2 to 12
Poisson's Ratio 0.34
0.32
Shear Modulus, GPa 69
26
Tensile Strength: Ultimate (UTS), MPa 210 to 540
490 to 570
Tensile Strength: Yield (Proof), MPa 140 to 390
390 to 500

Thermal Properties

Latent Heat of Fusion, J/g 140
370
Specific Heat Capacity, J/kg-K 140
860
Thermal Conductivity, W/m-K 59
140
Thermal Expansion, µm/m-K 6.5
24

Otherwise Unclassified Properties

Density, g/cm3 17
3.1
Embodied Water, L/kg 650
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
10 to 55
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
1110 to 1760
Stiffness to Weight: Axial, points 6.2
13
Stiffness to Weight: Bending, points 11
45
Strength to Weight: Axial, points 3.6 to 9.0
45 to 51
Strength to Weight: Bending, points 4.8 to 8.8
45 to 50
Thermal Diffusivity, mm2/s 25
54
Thermal Shock Resistance, points 13 to 32
21 to 25

Alloy Composition

Aluminum (Al), % 0
87.3 to 92.1
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 0
0 to 0.040
Copper (Cu), % 0
2.0 to 2.6
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 0.15
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 0
0 to 0.1
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
0
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.030
0
Silicon (Si), % 0 to 0.0050
0 to 0.12
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0 to 0.060
Tungsten (W), % 0 to 0.050
0
Zinc (Zn), % 0
5.7 to 6.7
Zirconium (Zr), % 0
0.080 to 0.15
Residuals, % 0
0 to 0.15