Nuclear Grade Hafnium vs. N06650 Nickel

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while N06650 nickel belongs to the nickel alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is N06650 nickel.

Nuclear Grade (Grade R1) Hafnium UNS N06650 (2.4850) Nickel Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		25
Elongation at Break, %		50

Poisson's Ratio		0.26
Poisson's Ratio		0.29

Shear Modulus, GPa		31
Shear Modulus, GPa		82

Tensile Strength: Ultimate (UTS), MPa		350
Tensile Strength: Ultimate (UTS), MPa		900

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		460

Thermal Properties

Latent Heat of Fusion, J/g		130
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		440

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.6

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		73
Resilience: Ultimate (Unit Rupture Work), MJ/m³		380

Resilience: Unit (Modulus of Resilience), kJ/m³		180
Resilience: Unit (Modulus of Resilience), kJ/m³		490

Stiffness to Weight: Axial, points		3.3
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		7.4
Strength to Weight: Axial, points		29

Strength to Weight: Bending, points		8.4
Strength to Weight: Bending, points		24

Thermal Shock Resistance, points		55
Thermal Shock Resistance, points		24

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0.050 to 0.5

Carbon (C), %		0
Carbon (C), %		0 to 0.030

Chromium (Cr), %		0
Chromium (Cr), %		19 to 21

Cobalt (Co), %		0
Cobalt (Co), %		0 to 1.0

Copper (Cu), %		0
Copper (Cu), %		0 to 0.3

Hafnium (Hf), %		99.8 to 100
Hafnium (Hf), %		0

Iron (Fe), %		0
Iron (Fe), %		12 to 16

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.5

Molybdenum (Mo), %		0
Molybdenum (Mo), %		9.5 to 12.5

Nickel (Ni), %		0
Nickel (Ni), %		44.4 to 58.9

Niobium (Nb), %		0
Niobium (Nb), %		0.050 to 0.5

Nitrogen (N), %		0
Nitrogen (N), %		0.050 to 0.2

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0
Silicon (Si), %		0 to 0.5

Sulfur (S), %		0
Sulfur (S), %		0 to 0.010

Tungsten (W), %		0
Tungsten (W), %		0.5 to 2.5

Residuals, %		0 to 0.23
Residuals, %		0