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Nuclear Grade Hafnium vs. SAE-AISI 1074 Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while SAE-AISI 1074 steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (15, 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 1074 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
190
Elongation at Break, % 25
11 to 14
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 31
72
Tensile Strength: Ultimate (UTS), MPa 350
740 to 820
Tensile Strength: Yield (Proof), MPa 170
450 to 570

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

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 180
550 to 860
Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 11
24
Strength to Weight: Axial, points 7.4
26 to 29
Strength to Weight: Bending, points 8.4
23 to 25
Thermal Shock Resistance, points 55
24 to 26

Alloy Composition

Carbon (C), % 0
0.7 to 0.8
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
98.3 to 98.8
Manganese (Mn), % 0
0.5 to 0.8
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Residuals, % 0 to 0.23
0