C34500 Brass vs. R05240 Alloy

C34500 brass belongs to the copper alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C34500 brass and the bottom bar is R05240 alloy.

UNS C34500 Leaded Brass UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		150

Elongation at Break, %		12 to 28
Elongation at Break, %		25

Poisson's Ratio		0.31
Poisson's Ratio		0.36

Shear Modulus, GPa		40
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		340 to 430
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		120 to 180
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		14

Embodied Water, L/kg		320
Embodied Water, L/kg		460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		42 to 75
Resilience: Ultimate (Unit Rupture Work), MJ/m³		59

Resilience: Unit (Modulus of Resilience), kJ/m³		69 to 160
Resilience: Unit (Modulus of Resilience), kJ/m³		90

Stiffness to Weight: Axial, points		7.1
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		13

Strength to Weight: Axial, points		12 to 15
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		13 to 16
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		11 to 14
Thermal Shock Resistance, points		18

Alloy Composition

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

Copper (Cu), %		62 to 65
Copper (Cu), %		0

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

Iron (Fe), %		0 to 0.15
Iron (Fe), %		0 to 0.010

Lead (Pb), %		1.5 to 2.5
Lead (Pb), %		0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 0.020

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.010

Niobium (Nb), %		0
Niobium (Nb), %		35 to 42

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.020

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

Tantalum (Ta), %		0
Tantalum (Ta), %		57.9 to 65

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.010

Tungsten (W), %		0
Tungsten (W), %		0 to 0.050

Zinc (Zn), %		32 to 36.5
Zinc (Zn), %		0

Residuals, %		0 to 0.4
Residuals, %		0