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Nuclear Grade Hafnium vs. ACI-ASTM CC50 Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while ACI-ASTM CC50 steel belongs to the iron alloys. There are 13 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is ACI-ASTM CC50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
200
Poisson's Ratio 0.26
0.27
Shear Modulus, GPa 31
80
Tensile Strength: Ultimate (UTS), MPa 350
430

Thermal Properties

Latent Heat of Fusion, J/g 130
300
Specific Heat Capacity, J/kg-K 140
490
Thermal Expansion, µm/m-K 5.9
11

Otherwise Unclassified Properties

Density, g/cm3 13
7.6

Common Calculations

Stiffness to Weight: Axial, points 3.3
15
Stiffness to Weight: Bending, points 11
26
Strength to Weight: Axial, points 7.4
16
Strength to Weight: Bending, points 8.4
17
Thermal Shock Resistance, points 55
14

Alloy Composition

Carbon (C), % 0
0 to 0.5
Chromium (Cr), % 0
26 to 30
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
62.9 to 74
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 4.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Residuals, % 0 to 0.23
0