C34000 Brass vs. C87300 Bronze

Both C34000 brass and C87300 bronze are copper alloys. They have 64% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C34000 brass and the bottom bar is C87300 bronze.

UNS C34000 (CW600N) Leaded Brass UNS C87300 Silicon Bronze

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.31
Poisson's Ratio		0.34

Shear Modulus, GPa		40
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		340 to 650
Tensile Strength: Ultimate (UTS), MPa		350

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		280

Maximum Temperature: Mechanical, °C		120
Maximum Temperature: Mechanical, °C		200

Melting Completion (Liquidus), °C		930
Melting Completion (Liquidus), °C		970

Melting Onset (Solidus), °C		890
Melting Onset (Solidus), °C		820

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		410

Thermal Conductivity, W/m-K		120
Thermal Conductivity, W/m-K		28

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		26
Electrical Conductivity: Equal Volume, % IACS		6.1

Electrical Conductivity: Equal Weight (Specific), % IACS		29
Electrical Conductivity: Equal Weight (Specific), % IACS		6.4

Otherwise Unclassified Properties

Base Metal Price, % relative		24
Base Metal Price, % relative		29

Density, g/cm³		8.1
Density, g/cm³		8.6

Embodied Carbon, kg CO₂/kg material		2.6
Embodied Carbon, kg CO₂/kg material		2.7

Embodied Energy, MJ/kg		45
Embodied Energy, MJ/kg		42

Embodied Water, L/kg		320
Embodied Water, L/kg		300

Common Calculations

Stiffness to Weight: Axial, points		7.1
Stiffness to Weight: Axial, points		7.5

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

Strength to Weight: Axial, points		11 to 22
Strength to Weight: Axial, points		11

Strength to Weight: Bending, points		13 to 21
Strength to Weight: Bending, points		13

Thermal Diffusivity, mm²/s		37
Thermal Diffusivity, mm²/s		8.0

Thermal Shock Resistance, points		11 to 22
Thermal Shock Resistance, points		13

Alloy Composition

Copper (Cu), %		62 to 65
Copper (Cu), %		94 to 95.7

Iron (Fe), %		0 to 0.1
Iron (Fe), %		0 to 0.2

Lead (Pb), %		0.8 to 1.5
Lead (Pb), %		0 to 0.2

Manganese (Mn), %		0
Manganese (Mn), %		0.8 to 1.5

Silicon (Si), %		0
Silicon (Si), %		3.5 to 5.0

Zinc (Zn), %		33 to 37.2
Zinc (Zn), %		0 to 0.25

Residuals, %		0
Residuals, %		0 to 0.5