Nuclear Grade Hafnium vs. Chromium 33

Both nuclear grade hafnium and chromium 33 are otherwise unclassified metals. Both are furnished in the annealed condition. There are 17 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nuclear grade hafnium and the bottom bar is chromium 33.

Nuclear Grade (Grade R1) Hafnium Chromium Alloy 33 (R20033)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		25
Elongation at Break, %		45

Poisson's Ratio		0.26
Poisson's Ratio		0.27

Shear Modulus, GPa		31
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		350
Tensile Strength: Ultimate (UTS), MPa		850

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		430

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		480

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		7.9

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		73
Resilience: Ultimate (Unit Rupture Work), MJ/m³		320

Resilience: Unit (Modulus of Resilience), kJ/m³		180
Resilience: Unit (Modulus of Resilience), kJ/m³		450

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

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		7.4
Strength to Weight: Axial, points		30

Strength to Weight: Bending, points		8.4
Strength to Weight: Bending, points		25

Thermal Shock Resistance, points		55
Thermal Shock Resistance, points		21

Alloy Composition

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Carbon (C), %		0
Carbon (C), %		0 to 0.015

Chromium (Cr), %		0
Chromium (Cr), %		31 to 35

Copper (Cu), %		0
Copper (Cu), %		0.3 to 1.2

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

Iron (Fe), %		0
Iron (Fe), %		25.7 to 37.9

Manganese (Mn), %		0
Manganese (Mn), %		0 to 2.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0.5 to 2.0

Nickel (Ni), %		0
Nickel (Ni), %		30 to 33

Nitrogen (N), %		0
Nitrogen (N), %		0.35 to 0.6

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

Residuals, %		0 to 0.23
Residuals, %		0