C66900 Brass vs. C71640 Copper-nickel

Both C66900 brass and C71640 copper-nickel are copper alloys. They have 66% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C66900 brass and the bottom bar is C71640 copper-nickel.

UNS C66900 Manganese Brass UNS C71640 Copper-Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		140

Poisson's Ratio		0.32
Poisson's Ratio		0.33

Shear Modulus, GPa		45
Shear Modulus, GPa		52

Tensile Strength: Ultimate (UTS), MPa		460 to 770
Tensile Strength: Ultimate (UTS), MPa		490 to 630

Tensile Strength: Yield (Proof), MPa		330 to 760
Tensile Strength: Yield (Proof), MPa		190 to 460

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		240

Maximum Temperature: Mechanical, °C		150
Maximum Temperature: Mechanical, °C		260

Melting Completion (Liquidus), °C		860
Melting Completion (Liquidus), °C		1180

Melting Onset (Solidus), °C		850
Melting Onset (Solidus), °C		1120

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		410

Thermal Expansion, µm/m-K		20
Thermal Expansion, µm/m-K		15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		3.4
Electrical Conductivity: Equal Volume, % IACS		7.0

Electrical Conductivity: Equal Weight (Specific), % IACS		3.8
Electrical Conductivity: Equal Weight (Specific), % IACS		7.1

Otherwise Unclassified Properties

Base Metal Price, % relative		23
Base Metal Price, % relative		40

Density, g/cm³		8.2
Density, g/cm³		8.9

Embodied Carbon, kg CO₂/kg material		2.8
Embodied Carbon, kg CO₂/kg material		5.0

Embodied Energy, MJ/kg		46
Embodied Energy, MJ/kg		73

Embodied Water, L/kg		310
Embodied Water, L/kg		280

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		460 to 2450
Resilience: Unit (Modulus of Resilience), kJ/m³		130 to 750

Stiffness to Weight: Axial, points		8.1
Stiffness to Weight: Axial, points		8.7

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

Strength to Weight: Axial, points		15 to 26
Strength to Weight: Axial, points		15 to 20

Strength to Weight: Bending, points		16 to 23
Strength to Weight: Bending, points		16 to 18

Thermal Shock Resistance, points		14 to 23
Thermal Shock Resistance, points		16 to 21

Alloy Composition

Copper (Cu), %		62.5 to 64.5
Copper (Cu), %		61.7 to 67.8

Iron (Fe), %		0 to 0.25
Iron (Fe), %		1.7 to 2.3

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

Manganese (Mn), %		11.5 to 12.5
Manganese (Mn), %		1.5 to 2.5

Nickel (Ni), %		0
Nickel (Ni), %		29 to 32

Zinc (Zn), %		22.5 to 26
Zinc (Zn), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.5