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2218 Aluminum vs. Grade 702C Zirconium

2218 aluminum belongs to the aluminum alloys classification, while grade 702C zirconium belongs to the otherwise unclassified metals. There are 21 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 2218 aluminum and the bottom bar is grade 702C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 95 to 110
180
Elastic (Young's, Tensile) Modulus, GPa 73
97
Elongation at Break, % 6.8 to 10
13
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
36
Tensile Strength: Ultimate (UTS), MPa 330 to 430
430
Tensile Strength: Yield (Proof), MPa 260 to 310
310

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Specific Heat Capacity, J/kg-K 870
270
Thermal Conductivity, W/m-K 140
22
Thermal Expansion, µm/m-K 22
5.7

Otherwise Unclassified Properties

Density, g/cm3 3.1
6.7
Embodied Water, L/kg 1130
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
52
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
510
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 30 to 39
18
Strength to Weight: Bending, points 34 to 41
19
Thermal Diffusivity, mm2/s 52
12
Thermal Shock Resistance, points 15 to 19
55

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 1.0
0 to 0.3
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.9
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0
94.8 to 100
Residuals, % 0 to 0.15
0