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Nuclear Grade Hafnium vs. Grade TDSiCr Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while grade TDSiCr steel belongs to the iron alloys. There are 13 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is grade TDSiCr 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
80
Tensile Strength: Ultimate (UTS), MPa 350
1950

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

Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
70
Strength to Weight: Bending, points 8.4
45
Thermal Shock Resistance, points 55
58

Alloy Composition

Carbon (C), % 0
0.5 to 0.6
Chromium (Cr), % 0
0.5 to 0.8
Copper (Cu), % 0
0 to 0.1
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
96.6 to 97.8
Manganese (Mn), % 0
0.5 to 0.9
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
1.2 to 1.6
Sulfur (S), % 0
0 to 0.020
Residuals, % 0 to 0.23
0