C68000 Brass vs. C71000 Copper-nickel

Both C68000 brass and C71000 copper-nickel are copper alloys. They have 60% 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 C68000 brass and the bottom bar is C71000 copper-nickel.

UNS C68000 (RBCuZn-B) Filler Metal UNS C71000 Copper-Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		130

Poisson's Ratio		0.3
Poisson's Ratio		0.33

Shear Modulus, GPa		40
Shear Modulus, GPa		49

Tensile Strength: Ultimate (UTS), MPa		390
Tensile Strength: Ultimate (UTS), MPa		320 to 560

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		230

Maximum Temperature: Mechanical, °C		120
Maximum Temperature: Mechanical, °C		240

Melting Completion (Liquidus), °C		880
Melting Completion (Liquidus), °C		1200

Melting Onset (Solidus), °C		870
Melting Onset (Solidus), °C		1150

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		400

Thermal Conductivity, W/m-K		96
Thermal Conductivity, W/m-K		43

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		23
Base Metal Price, % relative		37

Density, g/cm³		8.0
Density, g/cm³		8.9

Embodied Carbon, kg CO₂/kg material		2.8
Embodied Carbon, kg CO₂/kg material		4.3

Embodied Energy, MJ/kg		48
Embodied Energy, MJ/kg		63

Embodied Water, L/kg		330
Embodied Water, L/kg		290

Common Calculations

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		8.2

Stiffness to Weight: Bending, points		20
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		10 to 18

Strength to Weight: Bending, points		15
Strength to Weight: Bending, points		12 to 17

Thermal Diffusivity, mm²/s		31
Thermal Diffusivity, mm²/s		12

Thermal Shock Resistance, points		13
Thermal Shock Resistance, points		12 to 20

Alloy Composition

Aluminum (Al), %		0 to 0.010
Aluminum (Al), %		0

Copper (Cu), %		56 to 60
Copper (Cu), %		73.5 to 80.5

Iron (Fe), %		0.25 to 1.3
Iron (Fe), %		0.5 to 1.0

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

Manganese (Mn), %		0.010 to 0.5
Manganese (Mn), %		0 to 1.0

Nickel (Ni), %		0.2 to 0.8
Nickel (Ni), %		19 to 23

Silicon (Si), %		0.040 to 0.15
Silicon (Si), %		0

Tin (Sn), %		0.75 to 1.1
Tin (Sn), %		0

Zinc (Zn), %		35.6 to 42.8
Zinc (Zn), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.5