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Nuclear Grade Hafnium vs. EN 1.4568 Stainless Steel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while EN 1.4568 stainless steel belongs to the iron alloys. 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 nuclear grade hafnium and the bottom bar is EN 1.4568 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
200
Elongation at Break, % 25
2.3 to 21
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 31
76
Tensile Strength: Ultimate (UTS), MPa 350
830 to 1620
Tensile Strength: Yield (Proof), MPa 170
330 to 1490

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
13

Otherwise Unclassified Properties

Density, g/cm3 13
7.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
36 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 180
290 to 5710
Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 7.4
30 to 58
Strength to Weight: Bending, points 8.4
25 to 40
Thermal Shock Resistance, points 55
23 to 46

Alloy Composition

Aluminum (Al), % 0
0.7 to 1.5
Carbon (C), % 0
0 to 0.090
Chromium (Cr), % 0
16 to 18
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
70.9 to 76.8
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
6.5 to 7.8
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Residuals, % 0 to 0.23
0