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EN 1.7231 Steel vs. Nuclear Grade Hafnium

EN 1.7231 steel belongs to the iron alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is EN 1.7231 steel and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
78
Elongation at Break, % 11 to 12
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 73
31
Tensile Strength: Ultimate (UTS), MPa 790 to 930
350
Tensile Strength: Yield (Proof), MPa 570 to 800
170

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

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 100
73
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 1700
180
Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 28 to 33
7.4
Strength to Weight: Bending, points 24 to 27
8.4
Thermal Shock Resistance, points 23 to 27
55

Alloy Composition


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Carbon (C), % 0.38 to 0.45
0
Chromium (Cr), % 0.8 to 1.2
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 96.4 to 98.1
0
Manganese (Mn), % 0.6 to 1.0
0
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.23