C72900 Copper-nickel vs. C23400 Brass

Both C72900 copper-nickel and C23400 brass are copper alloys. They have 76% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C72900 copper-nickel and the bottom bar is C23400 brass.

UNS C72900 Tin-Bearing Copper-Nickel UNS C23400 Red Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		110

Poisson's Ratio		0.34
Poisson's Ratio		0.32

Shear Modulus, GPa		45
Shear Modulus, GPa		42

Tensile Strength: Ultimate (UTS), MPa		870 to 1080
Tensile Strength: Ultimate (UTS), MPa		370 to 640

Thermal Properties

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

Maximum Temperature: Mechanical, °C		210
Maximum Temperature: Mechanical, °C		160

Melting Completion (Liquidus), °C		1120
Melting Completion (Liquidus), °C		970

Melting Onset (Solidus), °C		950
Melting Onset (Solidus), °C		930

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		390

Thermal Conductivity, W/m-K		29
Thermal Conductivity, W/m-K		120

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		19

Otherwise Unclassified Properties

Base Metal Price, % relative		39
Base Metal Price, % relative		27

Density, g/cm³		8.8
Density, g/cm³		8.5

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		2.6

Embodied Energy, MJ/kg		72
Embodied Energy, MJ/kg		43

Embodied Water, L/kg		360
Embodied Water, L/kg		320

Common Calculations

Stiffness to Weight: Axial, points		7.6
Stiffness to Weight: Axial, points		7.2

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

Strength to Weight: Axial, points		27 to 34
Strength to Weight: Axial, points		12 to 21

Strength to Weight: Bending, points		23 to 27
Strength to Weight: Bending, points		13 to 19

Thermal Diffusivity, mm²/s		8.6
Thermal Diffusivity, mm²/s		36

Thermal Shock Resistance, points		31 to 38
Thermal Shock Resistance, points		12 to 22

Alloy Composition

Copper (Cu), %		74.1 to 78
Copper (Cu), %		81 to 84

Iron (Fe), %		0 to 0.5
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.020
Lead (Pb), %		0 to 0.050

Magnesium (Mg), %		0 to 0.15
Magnesium (Mg), %		0

Manganese (Mn), %		0 to 0.3
Manganese (Mn), %		0

Nickel (Ni), %		14.5 to 15.5
Nickel (Ni), %		0

Niobium (Nb), %		0 to 0.1
Niobium (Nb), %		0

Tin (Sn), %		7.5 to 8.5
Tin (Sn), %		0

Zinc (Zn), %		0 to 0.5
Zinc (Zn), %		15.7 to 19

Residuals, %		0
Residuals, %		0 to 0.2