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EN 1.7378 Steel vs. Nuclear Grade Hafnium

EN 1.7378 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 (16, in this case) are not shown.

For each property being compared, the top bar is EN 1.7378 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, % 17
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 74
31
Tensile Strength: Ultimate (UTS), MPa 700
350
Tensile Strength: Yield (Proof), MPa 490
170

Thermal Properties

Latent Heat of Fusion, J/g 260
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 110
73
Resilience: Unit (Modulus of Resilience), kJ/m3 630
180
Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 25
7.4
Strength to Weight: Bending, points 22
8.4
Thermal Shock Resistance, points 20
55

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0015 to 0.0070
0
Carbon (C), % 0.050 to 0.1
0
Chromium (Cr), % 2.2 to 2.6
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 94.6 to 96.1
0
Manganese (Mn), % 0.3 to 0.7
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nitrogen (N), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.15 to 0.45
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.050 to 0.1
0
Vanadium (V), % 0.2 to 0.3
0
Residuals, % 0
0 to 0.23