C27400 Brass vs. Type 3 Niobium

C27400 brass belongs to the copper alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is C27400 brass and the bottom bar is Type 3 niobium.

UNS C27400 (CW508L) Yellow Brass Type 3 (Alloyed Reactor Grade, R04251) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		100

Poisson's Ratio		0.31
Poisson's Ratio		0.4

Shear Modulus, GPa		40
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		370 to 650
Tensile Strength: Ultimate (UTS), MPa		220

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		310

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		270

Thermal Conductivity, W/m-K		120
Thermal Conductivity, W/m-K		42

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		8.0
Density, g/cm³		8.6

Embodied Water, L/kg		320
Embodied Water, L/kg		160

Common Calculations

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		20
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		13 to 23
Strength to Weight: Axial, points		7.2

Strength to Weight: Bending, points		14 to 21
Strength to Weight: Bending, points		9.5

Thermal Diffusivity, mm²/s		37
Thermal Diffusivity, mm²/s		18

Thermal Shock Resistance, points		12 to 22
Thermal Shock Resistance, points		21

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0 to 0.010

Copper (Cu), %		61 to 64
Copper (Cu), %		0

Hafnium (Hf), %		0
Hafnium (Hf), %		0 to 0.020

Hydrogen (H), %		0
Hydrogen (H), %		0 to 0.0015

Iron (Fe), %		0 to 0.1
Iron (Fe), %		0 to 0.0050

Lead (Pb), %		0 to 0.050
Lead (Pb), %		0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 0.010

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.0050

Niobium (Nb), %		0
Niobium (Nb), %		98.6 to 99.2

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.010

Oxygen (O), %		0
Oxygen (O), %		0 to 0.015

Silicon (Si), %		0
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.1

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.020

Tungsten (W), %		0
Tungsten (W), %		0 to 0.030

Zinc (Zn), %		35.6 to 39
Zinc (Zn), %		0

Zirconium (Zr), %		0
Zirconium (Zr), %		0.8 to 1.2

Residuals, %		0 to 0.3
Residuals, %		0