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Grade 705C Zirconium vs. 1235 Aluminum

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while 1235 aluminum belongs to the aluminum alloys. 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 grade 705C zirconium and the bottom bar is 1235 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
69
Elongation at Break, % 13
28 to 34
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 36
26
Tensile Strength: Ultimate (UTS), MPa 540
80 to 84
Tensile Strength: Yield (Proof), MPa 390
23 to 57

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Specific Heat Capacity, J/kg-K 270
900
Thermal Conductivity, W/m-K 18
230
Thermal Expansion, µm/m-K 5.7
23

Otherwise Unclassified Properties

Density, g/cm3 6.7
2.7
Embodied Water, L/kg 450
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 66
17 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 790
3.8 to 24
Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 22
8.2 to 8.6
Strength to Weight: Bending, points 22
15 to 16
Thermal Diffusivity, mm2/s 9.9
93
Thermal Shock Resistance, points 69
3.6 to 3.7

Alloy Composition

Aluminum (Al), % 0
99.35 to 100
Carbon (C), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.050
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
0 to 0.65
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 0.050
Niobium (Nb), % 2.0 to 3.0
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.65
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.1
Zirconium (Zr), % 91.9 to 98
0