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SAE-AISI 9254 Steel vs. Nuclear Grade Hafnium

SAE-AISI 9254 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 SAE-AISI 9254 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, % 20
25
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 72
31
Tensile Strength: Ultimate (UTS), MPa 660
350
Tensile Strength: Yield (Proof), MPa 410
170

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

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
73
Resilience: Unit (Modulus of Resilience), kJ/m3 450
180
Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 25
11
Strength to Weight: Axial, points 24
7.4
Strength to Weight: Bending, points 22
8.4
Thermal Shock Resistance, points 20
55

Alloy Composition

Carbon (C), % 0.51 to 0.59
0
Chromium (Cr), % 0.6 to 0.8
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 96.1 to 97.1
0
Manganese (Mn), % 0.6 to 0.8
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 1.2 to 1.6
0
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.23