C68700 Brass vs. R05240 Alloy

C68700 brass belongs to the copper alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 16 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 C68700 brass and the bottom bar is R05240 alloy.

UNS C68700 (CW702R) Aluminum Brass UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		150

Poisson's Ratio		0.32
Poisson's Ratio		0.36

Shear Modulus, GPa		41
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		390
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		140
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.3
Density, g/cm³		14

Embodied Water, L/kg		340
Embodied Water, L/kg		460

Common Calculations

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

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		6.3

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

Strength to Weight: Axial, points		13
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		14
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		13
Thermal Shock Resistance, points		18

Alloy Composition

Aluminum (Al), %		1.8 to 2.5
Aluminum (Al), %		0

Arsenic (As), %		0.020 to 0.1
Arsenic (As), %		0

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

Copper (Cu), %		76 to 79
Copper (Cu), %		0

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

Iron (Fe), %		0 to 0.060
Iron (Fe), %		0 to 0.010

Lead (Pb), %		0 to 0.070
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), %		17.8 to 22.2
Zinc (Zn), %		0

Residuals, %		0 to 0.5
Residuals, %		0