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C72900 Copper-nickel vs. C18600 Copper

Both C72900 copper-nickel and C18600 copper are copper alloys. They have 77% of their average alloy composition in common.

For each property being compared, the top bar is C72900 copper-nickel and the bottom bar is C18600 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
120
Elongation at Break, % 6.0 to 20
8.0 to 11
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 45
44
Shear Strength, MPa 540 to 630
310 to 340
Tensile Strength: Ultimate (UTS), MPa 870 to 1080
520 to 580
Tensile Strength: Yield (Proof), MPa 700 to 920
500 to 520

Thermal Properties

Latent Heat of Fusion, J/g 210
210
Maximum Temperature: Mechanical, °C 210
200
Melting Completion (Liquidus), °C 1120
1090
Melting Onset (Solidus), °C 950
1070
Specific Heat Capacity, J/kg-K 380
390
Thermal Conductivity, W/m-K 29
280
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
70
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
71

Otherwise Unclassified Properties

Base Metal Price, % relative 39
31
Density, g/cm3 8.8
8.9
Embodied Carbon, kg CO2/kg material 4.6
2.9
Embodied Energy, MJ/kg 72
46
Embodied Water, L/kg 360
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49 to 210
44 to 58
Resilience: Unit (Modulus of Resilience), kJ/m3 2030 to 3490
1060 to 1180
Stiffness to Weight: Axial, points 7.6
7.3
Stiffness to Weight: Bending, points 19
18
Strength to Weight: Axial, points 27 to 34
16 to 18
Strength to Weight: Bending, points 23 to 27
16 to 17
Thermal Diffusivity, mm2/s 8.6
81
Thermal Shock Resistance, points 31 to 38
19 to 20

Alloy Composition

Chromium (Cr), % 0
0.1 to 1.0
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 74.1 to 78
96.5 to 99.55
Iron (Fe), % 0 to 0.5
0.25 to 0.8
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 14.5 to 15.5
0 to 0.25
Niobium (Nb), % 0 to 0.1
0
Tin (Sn), % 7.5 to 8.5
0
Titanium (Ti), % 0
0.050 to 0.5
Zinc (Zn), % 0 to 0.5
0
Zirconium (Zr), % 0
0.050 to 0.4
Residuals, % 0
0 to 0.5

Comparable Variants