Nuclear Grade Hafnium vs. Nickel 908

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while nickel 908 belongs to the nickel alloys. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is nickel 908.

Nuclear Grade (Grade R1) Hafnium Nickel Alloy 908 (N09908)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		180

Elongation at Break, %		25
Elongation at Break, %		11

Poisson's Ratio		0.26
Poisson's Ratio		0.3

Shear Modulus, GPa		31
Shear Modulus, GPa		70

Tensile Strength: Ultimate (UTS), MPa		350
Tensile Strength: Ultimate (UTS), MPa		1340

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		930

Thermal Properties

Latent Heat of Fusion, J/g		130
Latent Heat of Fusion, J/g		290

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		460

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		8.6

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.3

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		73
Resilience: Ultimate (Unit Rupture Work), MJ/m³		140

Resilience: Unit (Modulus of Resilience), kJ/m³		180
Resilience: Unit (Modulus of Resilience), kJ/m³		2340

Stiffness to Weight: Axial, points		3.3
Stiffness to Weight: Axial, points		12

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

Strength to Weight: Axial, points		7.4
Strength to Weight: Axial, points		45

Strength to Weight: Bending, points		8.4
Strength to Weight: Bending, points		33

Thermal Shock Resistance, points		55
Thermal Shock Resistance, points		61

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0.75 to 1.3

Boron (B), %		0
Boron (B), %		0 to 0.012

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

Chromium (Cr), %		0
Chromium (Cr), %		3.8 to 4.5

Cobalt (Co), %		0
Cobalt (Co), %		0 to 0.5

Copper (Cu), %		0
Copper (Cu), %		0 to 0.5

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

Iron (Fe), %		0
Iron (Fe), %		35.6 to 44.6

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.0

Nickel (Ni), %		0
Nickel (Ni), %		47 to 51

Niobium (Nb), %		0
Niobium (Nb), %		2.7 to 3.3

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.015

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

Sulfur (S), %		0
Sulfur (S), %		0 to 0.0050

Titanium (Ti), %		0
Titanium (Ti), %		1.2 to 1.8

Residuals, %		0 to 0.23
Residuals, %		0