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7050 Aluminum vs. Type 3 Niobium

7050 aluminum belongs to the aluminum alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 20 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 7050 aluminum and the bottom bar is Type 3 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 2.2 to 12
23
Poisson's Ratio 0.32
0.4
Shear Modulus, GPa 26
38
Tensile Strength: Ultimate (UTS), MPa 490 to 570
220
Tensile Strength: Yield (Proof), MPa 390 to 500
140

Thermal Properties

Latent Heat of Fusion, J/g 370
310
Specific Heat Capacity, J/kg-K 860
270
Thermal Conductivity, W/m-K 140
42
Thermal Expansion, µm/m-K 24
7.3

Otherwise Unclassified Properties

Density, g/cm3 3.1
8.6
Embodied Water, L/kg 1120
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 55
44
Resilience: Unit (Modulus of Resilience), kJ/m3 1110 to 1760
93
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 45 to 51
7.2
Strength to Weight: Bending, points 45 to 50
9.5
Thermal Diffusivity, mm2/s 54
18
Thermal Shock Resistance, points 21 to 25
21

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 2.0 to 2.6
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.15
0 to 0.0050
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
0 to 0.010
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
98.6 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0 to 0.12
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0 to 0.060
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zinc (Zn), % 5.7 to 6.7
0
Zirconium (Zr), % 0.080 to 0.15
0.8 to 1.2
Residuals, % 0 to 0.15
0