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Grade TDC Steel vs. Nuclear Grade Hafnium

Grade TDC steel belongs to the iron alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. 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 grade TDC steel and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
78
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 80
31
Tensile Strength: Ultimate (UTS), MPa 1700
350

Thermal Properties

Latent Heat of Fusion, J/g 250
130
Specific Heat Capacity, J/kg-K 470
140
Thermal Expansion, µm/m-K 13
5.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
13

Common Calculations

Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 60
7.4
Strength to Weight: Bending, points 40
8.4
Thermal Shock Resistance, points 50
55

Alloy Composition

Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.1
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 98 to 99.4
0
Manganese (Mn), % 0.5 to 1.2
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.1 to 0.35
0
Sulfur (S), % 0 to 0.020
0
Residuals, % 0
0 to 0.23