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EN 1.7108 Steel vs. Nuclear Grade Hafnium

EN 1.7108 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 (16, in this case) are not shown.

For each property being compared, the top bar is EN 1.7108 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 72
31
Tensile Strength: Ultimate (UTS), MPa 670 to 2070
350

Thermal Properties

Latent Heat of Fusion, J/g 280
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 24 to 75
7.4
Strength to Weight: Bending, points 22 to 47
8.4
Thermal Shock Resistance, points 20 to 63
55

Alloy Composition

Carbon (C), % 0.57 to 0.65
0
Chromium (Cr), % 0.2 to 0.45
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 95.9 to 96.9
0
Manganese (Mn), % 0.7 to 1.0
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 1.6 to 2.0
0
Sulfur (S), % 0 to 0.025
0
Residuals, % 0
0 to 0.23