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EQ21A Magnesium vs. Reactor Grade Zirconium

EQ21A magnesium belongs to the magnesium alloys classification, while reactor grade zirconium belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (15, 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 EQ21A magnesium and the bottom bar is reactor grade zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
98
Elongation at Break, % 2.4
21
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 17
37
Tensile Strength: Ultimate (UTS), MPa 250
330
Tensile Strength: Yield (Proof), MPa 190
160

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Specific Heat Capacity, J/kg-K 980
270
Thermal Conductivity, W/m-K 110
22
Thermal Expansion, µm/m-K 27
5.9

Otherwise Unclassified Properties

Density, g/cm3 1.9
6.5

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
56
Resilience: Unit (Modulus of Resilience), kJ/m3 410
130
Stiffness to Weight: Axial, points 13
8.4
Stiffness to Weight: Bending, points 63
24
Strength to Weight: Axial, points 37
14
Strength to Weight: Bending, points 47
16
Thermal Diffusivity, mm2/s 62
13
Thermal Shock Resistance, points 15
41

Alloy Composition

Copper (Cu), % 0.050 to 0.1
0
Magnesium (Mg), % 93.9 to 96.8
0
Nickel (Ni), % 0 to 0.010
0
Silver (Ag), % 1.3 to 1.7
0
Unspecified Rare Earths, % 1.5 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
99.7 to 100
Residuals, % 0 to 0.3
0 to 0.27