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AZ31C Magnesium vs. Nuclear Grade Hafnium

AZ31C 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 (13, 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 AZ31C magnesium and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
78
Elongation at Break, % 12
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 17
31
Tensile Strength: Ultimate (UTS), MPa 260
350
Tensile Strength: Yield (Proof), MPa 200
170

Thermal Properties

Latent Heat of Fusion, J/g 350
130
Specific Heat Capacity, J/kg-K 990
140
Thermal Expansion, µm/m-K 26
5.9

Otherwise Unclassified Properties

Density, g/cm3 1.7
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28
73
Resilience: Unit (Modulus of Resilience), kJ/m3 440
180
Stiffness to Weight: Axial, points 15
3.3
Stiffness to Weight: Bending, points 70
11
Strength to Weight: Axial, points 42
7.4
Strength to Weight: Bending, points 53
8.4
Thermal Shock Resistance, points 16
55

Alloy Composition

Aluminum (Al), % 2.4 to 3.6
0
Copper (Cu), % 0 to 0.1
0
Hafnium (Hf), % 0
99.8 to 100
Magnesium (Mg), % 93.4 to 97
0
Manganese (Mn), % 0.15 to 1.0
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.1
0
Zinc (Zn), % 0.5 to 1.5
0
Residuals, % 0
0 to 0.23