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Nuclear Grade Hafnium vs. ASTM F15 Fe-Ni-Co

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while ASTM F15 Fe-Ni-Co belongs to the iron alloys. There are 13 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 ASTM F15 Fe-Ni-Co.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
190
Poisson's Ratio 0.26
0.3
Shear Modulus, GPa 31
73
Tensile Strength: Ultimate (UTS), MPa 350
520 to 880

Thermal Properties

Latent Heat of Fusion, J/g 130
270
Specific Heat Capacity, J/kg-K 140
460
Thermal Expansion, µm/m-K 5.9
6.0

Otherwise Unclassified Properties

Density, g/cm3 13
8.3

Common Calculations

Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 11
23
Strength to Weight: Axial, points 7.4
17 to 29
Strength to Weight: Bending, points 8.4
17 to 24
Thermal Shock Resistance, points 55
32 to 55

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
0 to 0.2
Cobalt (Co), % 0
16 to 18
Copper (Cu), % 0
0 to 0.2
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
50.3 to 56
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0
28 to 30
Silicon (Si), % 0
0 to 0.2
Titanium (Ti), % 0
0 to 0.1
Zirconium (Zr), % 0
0 to 0.1
Residuals, % 0 to 0.23
0