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AWS BMg-1 vs. Nuclear Grade Hafnium

AWS BMg-1 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 (14, 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 AWS BMg-1 and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
78
Elongation at Break, % 3.8
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 18
31
Tensile Strength: Ultimate (UTS), MPa 180
350
Tensile Strength: Yield (Proof), MPa 110
170

Thermal Properties

Latent Heat of Fusion, J/g 350
130
Specific Heat Capacity, J/kg-K 980
140
Thermal Expansion, µm/m-K 26
5.9

Otherwise Unclassified Properties

Density, g/cm3 1.8
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
73
Resilience: Unit (Modulus of Resilience), kJ/m3 120
180
Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 66
11
Strength to Weight: Axial, points 27
7.4
Strength to Weight: Bending, points 39
8.4
Thermal Shock Resistance, points 10
55

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Beryllium (Be), % 0.00020 to 0.00080
0
Copper (Cu), % 0 to 0.050
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 0 to 0.0050
0
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.050
0
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0 to 0.23