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Nuclear Grade Hafnium vs. SAE-AISI O1 Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while SAE-AISI O1 steel belongs to the iron alloys. There are 13 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is SAE-AISI O1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
190
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 31
72
Tensile Strength: Ultimate (UTS), MPa 350
640 to 2060

Thermal Properties

Latent Heat of Fusion, J/g 130
250
Specific Heat Capacity, J/kg-K 140
470
Thermal Expansion, µm/m-K 5.9
12

Otherwise Unclassified Properties

Density, g/cm3 13
7.8

Common Calculations

Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 11
24
Strength to Weight: Axial, points 7.4
23 to 73
Strength to Weight: Bending, points 8.4
21 to 46
Thermal Shock Resistance, points 55
21 to 68

Alloy Composition

Carbon (C), % 0
0.85 to 1.0
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 0
0 to 0.25
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
95 to 97.4
Manganese (Mn), % 0
1.0 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
0.4 to 0.6
Vanadium (V), % 0
0 to 0.3
Residuals, % 0 to 0.23
0