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C68400 Brass vs. C71640 Copper-nickel

Both C68400 brass and C71640 copper-nickel are copper alloys. They have 64% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
140
Poisson's Ratio 0.31
0.33
Shear Modulus, GPa 41
52
Tensile Strength: Ultimate (UTS), MPa 540
490 to 630
Tensile Strength: Yield (Proof), MPa 310
190 to 460

Thermal Properties

Latent Heat of Fusion, J/g 210
240
Maximum Temperature: Mechanical, °C 130
260
Melting Completion (Liquidus), °C 840
1180
Melting Onset (Solidus), °C 820
1120
Specific Heat Capacity, J/kg-K 400
410
Thermal Conductivity, W/m-K 66
29
Thermal Expansion, µm/m-K 20
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 23
40
Density, g/cm3 7.9
8.9
Embodied Carbon, kg CO2/kg material 2.7
5.0
Embodied Energy, MJ/kg 47
73
Embodied Water, L/kg 320
280

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 460
130 to 750
Stiffness to Weight: Axial, points 7.5
8.7
Stiffness to Weight: Bending, points 20
20
Strength to Weight: Axial, points 19
15 to 20
Strength to Weight: Bending, points 19
16 to 18
Thermal Diffusivity, mm2/s 21
8.2
Thermal Shock Resistance, points 18
16 to 21

Alloy Composition


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Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Copper (Cu), % 59 to 64
61.7 to 67.8
Iron (Fe), % 0 to 1.0
1.7 to 2.3
Lead (Pb), % 0 to 0.090
0 to 0.050
Manganese (Mn), % 0.2 to 1.5
1.5 to 2.5
Nickel (Ni), % 0 to 0.5
29 to 32
Phosphorus (P), % 0.030 to 0.3
0
Silicon (Si), % 1.5 to 2.5
0
Tin (Sn), % 0 to 0.5
0
Zinc (Zn), % 28.6 to 39.3
0 to 1.0
Residuals, % 0 to 0.5
0 to 0.5