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Reactor Grade Zirconium vs. ZK51A Magnesium

Reactor grade zirconium belongs to the otherwise unclassified metals classification, while ZK51A magnesium belongs to the magnesium alloys. There are 20 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 reactor grade zirconium and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
45
Elongation at Break, % 21
4.7
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 37
18
Tensile Strength: Ultimate (UTS), MPa 330
240
Tensile Strength: Yield (Proof), MPa 160
150

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Specific Heat Capacity, J/kg-K 270
970
Thermal Conductivity, W/m-K 22
110
Thermal Expansion, µm/m-K 5.9
26

Otherwise Unclassified Properties

Density, g/cm3 6.5
1.8
Embodied Water, L/kg 280
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
10
Resilience: Unit (Modulus of Resilience), kJ/m3 130
260
Stiffness to Weight: Axial, points 8.4
14
Stiffness to Weight: Bending, points 24
64
Strength to Weight: Axial, points 14
36
Strength to Weight: Bending, points 16
47
Thermal Diffusivity, mm2/s 13
61
Thermal Shock Resistance, points 41
15

Alloy Composition

Copper (Cu), % 0
0 to 0.1
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0
0 to 0.010
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 99.7 to 100
0.5 to 1.0
Residuals, % 0
0 to 0.3