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5021 Aluminum vs. Grade 705C Zirconium

5021 aluminum belongs to the aluminum alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 20 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 5021 aluminum and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
98
Elongation at Break, % 1.1 to 3.4
13
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
36
Tensile Strength: Ultimate (UTS), MPa 300 to 310
540
Tensile Strength: Yield (Proof), MPa 240 to 270
390

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Specific Heat Capacity, J/kg-K 900
270
Thermal Conductivity, W/m-K 140
18
Thermal Expansion, µm/m-K 23
5.7

Otherwise Unclassified Properties

Density, g/cm3 2.7
6.7
Embodied Water, L/kg 1180
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1 to 10
66
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 550
790
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 30 to 32
22
Strength to Weight: Bending, points 37
22
Thermal Diffusivity, mm2/s 57
9.9
Thermal Shock Resistance, points 13 to 14
69

Alloy Composition

Aluminum (Al), % 95.2 to 97.7
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 0.5
0 to 0.3
Magnesium (Mg), % 2.2 to 2.8
0
Manganese (Mn), % 0.1 to 0.5
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
Zinc (Zn), % 0 to 0.15
0
Zirconium (Zr), % 0
91.9 to 98
Residuals, % 0 to 0.15
0