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851.0 Aluminum vs. R05200 Tantalum

851.0 aluminum belongs to the aluminum alloys classification, while R05200 tantalum belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (12, 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 851.0 aluminum and the bottom bar is R05200 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 3.9 to 9.1
1.1 to 28
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
69
Tensile Strength: Ultimate (UTS), MPa 130 to 140
210 to 540

Thermal Properties

Latent Heat of Fusion, J/g 410
140
Specific Heat Capacity, J/kg-K 850
140
Thermal Conductivity, W/m-K 180
59
Thermal Expansion, µm/m-K 23
6.5

Otherwise Unclassified Properties

Density, g/cm3 3.1
17
Embodied Water, L/kg 1140
650

Common Calculations

Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 45
11
Strength to Weight: Axial, points 12 to 13
3.6 to 9.0
Strength to Weight: Bending, points 19 to 20
4.8 to 8.8
Thermal Diffusivity, mm2/s 69
25
Thermal Shock Resistance, points 6.1 to 6.3
13 to 32

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 0.7 to 1.3
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.7
0 to 0.010
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0.3 to 0.7
0 to 0.010
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 2.0 to 3.0
0 to 0.0050
Tantalum (Ta), % 0
99.8 to 100
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0 to 0.010
Tungsten (W), % 0
0 to 0.050
Residuals, % 0 to 0.3
0