Nuclear Grade Hafnium vs. C49300 Brass

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while C49300 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 C49300 brass.

Nuclear Grade (Grade R1) Hafnium UNS C49300 Bismuth Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		100

Elongation at Break, %		25
Elongation at Break, %		4.5 to 20

Poisson's Ratio		0.26
Poisson's Ratio		0.31

Shear Modulus, GPa		31
Shear Modulus, GPa		40

Tensile Strength: Ultimate (UTS), MPa		350
Tensile Strength: Ultimate (UTS), MPa		430 to 520

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		210 to 410

Thermal Properties

Latent Heat of Fusion, J/g		130
Latent Heat of Fusion, J/g		170

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		380

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

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.0

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		73
Resilience: Ultimate (Unit Rupture Work), MJ/m³		21 to 71

Resilience: Unit (Modulus of Resilience), kJ/m³		180
Resilience: Unit (Modulus of Resilience), kJ/m³		220 to 800

Stiffness to Weight: Axial, points		3.3
Stiffness to Weight: Axial, points		7.2

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		7.4
Strength to Weight: Axial, points		15 to 18

Strength to Weight: Bending, points		8.4
Strength to Weight: Bending, points		16 to 18

Thermal Shock Resistance, points		55
Thermal Shock Resistance, points		14 to 18

Alloy Composition

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

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.5

Bismuth (Bi), %		0
Bismuth (Bi), %		0.5 to 2.0

Copper (Cu), %		0
Copper (Cu), %		58 to 62

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

Iron (Fe), %		0
Iron (Fe), %		0 to 0.1

Lead (Pb), %		0
Lead (Pb), %		0 to 0.010

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.030

Nickel (Ni), %		0
Nickel (Ni), %		0 to 1.5

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.2

Selenium (Se), %		0
Selenium (Se), %		0 to 0.2

Silicon (Si), %		0
Silicon (Si), %		0 to 0.1

Tin (Sn), %		0
Tin (Sn), %		1.0 to 1.8

Zinc (Zn), %		0
Zinc (Zn), %		30.6 to 40.5

Residuals, %		0
Residuals, %		0 to 0.5