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Nuclear Grade Hafnium vs. S45000 Stainless Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while S45000 stainless steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
200
Elongation at Break, % 25
6.8 to 14
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 31
76
Tensile Strength: Ultimate (UTS), MPa 350
980 to 1410
Tensile Strength: Yield (Proof), MPa 170
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 130
280
Specific Heat Capacity, J/kg-K 140
480
Thermal Expansion, µm/m-K 5.9
11

Otherwise Unclassified Properties

Density, g/cm3 13
7.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 180
850 to 4400
Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
35 to 50
Strength to Weight: Bending, points 8.4
28 to 36
Thermal Shock Resistance, points 55
33 to 47

Alloy Composition

Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
72.1 to 79.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0
5.0 to 7.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.23
0