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705.0 Aluminum vs. Type 1 Niobium

705.0 aluminum belongs to the aluminum alloys classification, while Type 1 niobium belongs to the otherwise unclassified metals. There are 21 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 705.0 aluminum and the bottom bar is Type 1 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62 to 65
79
Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 8.4 to 10
29
Poisson's Ratio 0.33
0.4
Shear Modulus, GPa 26
38
Tensile Strength: Ultimate (UTS), MPa 240 to 260
140
Tensile Strength: Yield (Proof), MPa 130
82

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Specific Heat Capacity, J/kg-K 890
270
Thermal Conductivity, W/m-K 140
52
Thermal Expansion, µm/m-K 24
7.3

Otherwise Unclassified Properties

Density, g/cm3 2.8
8.6
Embodied Water, L/kg 1170
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
35
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
32
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 49
18
Strength to Weight: Axial, points 24 to 26
4.6
Strength to Weight: Bending, points 31 to 32
7.1
Thermal Diffusivity, mm2/s 55
23
Thermal Shock Resistance, points 11
13

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0 to 0.2
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.8
0 to 0.0050
Magnesium (Mg), % 1.4 to 1.8
0
Manganese (Mn), % 0 to 0.6
0
Molybdenum (Mo), % 0
0 to 0.010
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
99.7 to 100
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0 to 0.2
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0 to 0.25
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zinc (Zn), % 0 to 3.3
0
Zirconium (Zr), % 0
0 to 0.020
Residuals, % 0 to 0.15
0