Nuclear Grade Hafnium vs. C87900 Brass

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while C87900 brass belongs to the copper 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 C87900 brass.

Nuclear Grade (Grade R1) Hafnium UNS C87900 Silicon Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		110

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

Poisson's Ratio		0.26
Poisson's Ratio		0.31

Shear Modulus, GPa		31
Shear Modulus, GPa		41

Tensile Strength: Ultimate (UTS), MPa		350
Tensile Strength: Ultimate (UTS), MPa		480

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		240

Thermal Properties

Latent Heat of Fusion, J/g		130
Latent Heat of Fusion, J/g		190

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		20

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.1

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		73
Resilience: Ultimate (Unit Rupture Work), MJ/m³		100

Resilience: Unit (Modulus of Resilience), kJ/m³		180
Resilience: Unit (Modulus of Resilience), kJ/m³		270

Stiffness to Weight: Axial, points		3.3
Stiffness to Weight: Axial, points		7.3

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		20

Strength to Weight: Axial, points		7.4
Strength to Weight: Axial, points		17

Strength to Weight: Bending, points		8.4
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		55
Thermal Shock Resistance, points		16

Alloy Composition

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Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.15

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.050

Arsenic (As), %		0
Arsenic (As), %		0 to 0.050

Copper (Cu), %		0
Copper (Cu), %		63 to 69.2

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

Iron (Fe), %		0
Iron (Fe), %		0 to 0.4

Lead (Pb), %		0
Lead (Pb), %		0 to 0.25

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.15

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.5

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.010

Silicon (Si), %		0
Silicon (Si), %		0.8 to 1.2

Sulfur (S), %		0
Sulfur (S), %		0 to 0.050

Tin (Sn), %		0
Tin (Sn), %		0 to 0.25

Zinc (Zn), %		0
Zinc (Zn), %		30 to 36

Residuals, %		0 to 0.23
Residuals, %		0