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Nuclear Grade Hafnium vs. EN 1.4525 Stainless Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while EN 1.4525 stainless steel belongs to the iron alloys. 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 nuclear grade hafnium and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
190
Elongation at Break, % 25
5.6 to 13
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 31
76
Tensile Strength: Ultimate (UTS), MPa 350
1030 to 1250
Tensile Strength: Yield (Proof), MPa 170
840 to 1120

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
68 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1820 to 3230
Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
36 to 45
Strength to Weight: Bending, points 8.4
29 to 33
Thermal Shock Resistance, points 55
34 to 41

Alloy Composition

Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0
2.5 to 4.0
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
70.4 to 79
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.8
Nickel (Ni), % 0
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Residuals, % 0 to 0.23
0