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Nuclear Grade Hafnium vs. SAE-AISI 9254 Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while SAE-AISI 9254 steel belongs to the iron alloys. There are 17 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 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
190
Elongation at Break, % 25
20
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 31
72
Tensile Strength: Ultimate (UTS), MPa 350
660
Tensile Strength: Yield (Proof), MPa 170
410

Thermal Properties

Latent Heat of Fusion, J/g 130
270
Specific Heat Capacity, J/kg-K 140
480
Thermal Expansion, µm/m-K 5.9
13

Otherwise Unclassified Properties

Density, g/cm3 13
7.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
110
Resilience: Unit (Modulus of Resilience), kJ/m3 180
450
Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
24
Strength to Weight: Bending, points 8.4
22
Thermal Shock Resistance, points 55
20

Alloy Composition

Carbon (C), % 0
0.51 to 0.59
Chromium (Cr), % 0
0.6 to 0.8
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
96.1 to 97.1
Manganese (Mn), % 0
0.6 to 0.8
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
1.2 to 1.6
Sulfur (S), % 0
0 to 0.040
Residuals, % 0 to 0.23
0