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238.0 Aluminum vs. Type 2 Niobium

238.0 aluminum belongs to the aluminum alloys classification, while Type 2 niobium belongs to the otherwise unclassified metals. 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 238.0 aluminum and the bottom bar is Type 2 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
110
Elongation at Break, % 1.5
29
Poisson's Ratio 0.33
0.4
Shear Modulus, GPa 28
38
Tensile Strength: Ultimate (UTS), MPa 210
140
Tensile Strength: Yield (Proof), MPa 170
82

Thermal Properties

Latent Heat of Fusion, J/g 430
320
Specific Heat Capacity, J/kg-K 840
270
Thermal Conductivity, W/m-K 100
52
Thermal Expansion, µm/m-K 21
7.3

Otherwise Unclassified Properties

Density, g/cm3 3.4
8.6
Embodied Water, L/kg 1040
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
35
Resilience: Unit (Modulus of Resilience), kJ/m3 180
32
Stiffness to Weight: Axial, points 12
6.8
Stiffness to Weight: Bending, points 42
18
Strength to Weight: Axial, points 17
4.6
Strength to Weight: Bending, points 23
7.1
Thermal Diffusivity, mm2/s 37
23
Thermal Shock Resistance, points 9.1
13

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 9.5 to 10.5
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 1.0 to 1.5
0 to 0.010
Magnesium (Mg), % 0 to 0.25
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
99.5 to 100
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Silicon (Si), % 3.6 to 4.4
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.3
Titanium (Ti), % 0
0 to 0.030
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 1.0 to 1.5
0
Zirconium (Zr), % 0
0 to 0.020