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Nuclear Grade Hafnium vs. AWS E33-31

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while AWS E33-31 belongs to the iron alloys. There are 14 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is AWS E33-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
210
Elongation at Break, % 25
29
Poisson's Ratio 0.26
0.27
Shear Modulus, GPa 31
81
Tensile Strength: Ultimate (UTS), MPa 350
810

Thermal Properties

Latent Heat of Fusion, J/g 130
320
Specific Heat Capacity, J/kg-K 140
480
Thermal Expansion, µm/m-K 5.9
14

Otherwise Unclassified Properties

Density, g/cm3 13
7.9

Common Calculations

Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
28
Strength to Weight: Bending, points 8.4
24
Thermal Shock Resistance, points 55
19

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
31 to 35
Copper (Cu), % 0
0.4 to 0.8
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
24.7 to 34.8
Manganese (Mn), % 0
2.5 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.9
Sulfur (S), % 0
0 to 0.010
Residuals, % 0 to 0.23
0