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ACI-ASTM CT15C Steel vs. Nuclear Grade Hafnium

ACI-ASTM CT15C 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 (15, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CT15C steel and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
78
Elongation at Break, % 23
25
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 76
31
Tensile Strength: Ultimate (UTS), MPa 500
350
Tensile Strength: Yield (Proof), MPa 190
170

Thermal Properties

Latent Heat of Fusion, J/g 310
130
Specific Heat Capacity, J/kg-K 470
140
Thermal Expansion, µm/m-K 16
5.9

Otherwise Unclassified Properties

Density, g/cm3 8.0
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
73
Resilience: Unit (Modulus of Resilience), kJ/m3 93
180
Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 17
7.4
Strength to Weight: Bending, points 17
8.4
Thermal Shock Resistance, points 12
55

Alloy Composition

Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 40.3 to 49.2
0
Manganese (Mn), % 0.15 to 1.5
0
Nickel (Ni), % 31 to 34
0
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 1.5
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.23