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2017 Aluminum vs. Nuclear Grade Hafnium

2017 aluminum belongs to the aluminum alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 2017 aluminum and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
78
Elongation at Break, % 12 to 18
25
Poisson's Ratio 0.33
0.26
Shear Modulus, GPa 27
31
Tensile Strength: Ultimate (UTS), MPa 190 to 430
350
Tensile Strength: Yield (Proof), MPa 76 to 260
170

Thermal Properties

Latent Heat of Fusion, J/g 390
130
Specific Heat Capacity, J/kg-K 880
140
Thermal Expansion, µm/m-K 24
5.9

Otherwise Unclassified Properties

Density, g/cm3 3.0
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 66
73
Resilience: Unit (Modulus of Resilience), kJ/m3 41 to 470
180
Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 46
11
Strength to Weight: Axial, points 17 to 40
7.4
Strength to Weight: Bending, points 24 to 42
8.4
Thermal Shock Resistance, points 7.9 to 18
55

Alloy Composition

Aluminum (Al), % 91.6 to 95.5
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 1.0
0
Silicon (Si), % 0.2 to 0.8
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.23