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EZ33A Magnesium vs. Nuclear Grade Hafnium

EZ33A magnesium belongs to the magnesium alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (16, 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 EZ33A magnesium and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
78
Elongation at Break, % 2.6
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 17
31
Tensile Strength: Ultimate (UTS), MPa 150
350
Tensile Strength: Yield (Proof), MPa 100
170

Thermal Properties

Latent Heat of Fusion, J/g 330
130
Specific Heat Capacity, J/kg-K 970
140
Thermal Expansion, µm/m-K 27
5.9

Otherwise Unclassified Properties

Density, g/cm3 1.9
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.6
73
Resilience: Unit (Modulus of Resilience), kJ/m3 120
180
Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 61
11
Strength to Weight: Axial, points 22
7.4
Strength to Weight: Bending, points 33
8.4
Thermal Shock Resistance, points 9.2
55

Alloy Composition

Copper (Cu), % 0 to 0.1
0
Hafnium (Hf), % 0
99.8 to 100
Magnesium (Mg), % 91.5 to 95
0
Nickel (Ni), % 0 to 0.010
0
Unspecified Rare Earths, % 2.5 to 4.0
0
Zinc (Zn), % 2.0 to 3.1
0
Zirconium (Zr), % 0.5 to 1.0
0
Residuals, % 0
0 to 0.23