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Grade TDSiCr Steel vs. Nuclear Grade Hafnium

Grade TDSiCr 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 TDSiCr 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 1950
350

Thermal Properties

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

Otherwise Unclassified Properties

Density, g/cm3 7.7
13

Common Calculations

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

Alloy Composition

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