Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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C10100 Alloy (copper.org)Copper Development Associationarchived copyCopper C10100 · Yield strength: typical, 0.5% extension under load, 0.04 in. flatCopper C10100 · Ultimate tensile strength: typical, 0.04 in. flatCopper C10100 · Elongation at break: typical, 0.04 in. flatCopper C10100 · Young's modulus (stiffness): typicalCopper C10100 · Density: nominalCopper C10100 · Thermal conductivity: typical, 20 °CCopper C10100 · Thermal expansion: typical, mean 20-100 °CCopper C10100 · Specific heat: typical, 20 °CCopper C10100 · Melting point: melting point (liquidus = solidus, pure copper)
3
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefenseAluminum 7050-T7451 · Poisson's ratio: typical (handbook physical constant)
4
Wieland-K09 (Cu-OFE, C10100) Data SheetWielandCopper C10100 · Poisson's ratio: reference value at room temperature (Wieland-K09 = Cu-OFE = C10100, rolled products)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Aluminum 7050-T7451 stronger than Copper C10100?
Aluminum 7050-T7451 is stronger: its yield strength is 469 MPa against 69 MPa for Copper C10100 (6.8x).
Which is lighter, Aluminum 7050-T7451 or Copper C10100?
Aluminum 7050-T7451 is lighter: 2,830 kg/m³ against 8,941 kg/m³ for Copper C10100.
Which is stiffer, Aluminum 7050-T7451 or Copper C10100?
Copper C10100 is stiffer: Young's modulus 117 GPa against 70.3 GPa for Aluminum 7050-T7451, so the same part in Copper C10100 deflects less under the same load.
Which is lighter for the same job, Aluminum 7050-T7451 or Copper C10100?
For the same stiffness or strength: Aluminum 7050-T7451 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum 7050-T7451
Copper C10100
Stiff rod or tie (tension)
lighter
1.9x heavier
Stiff beam (bending)
lighter
2.45x heavier
Stiff panel or plate
lighter
2.66x heavier
Strong rod or tie
lighter
21.5x heavier
Strong beam
lighter
11.3x heavier
Strong panel or plate
lighter
8.24x heavier
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which is more ductile, Aluminum 7050-T7451 or Copper C10100?
Copper C10100 stretches further before it breaks: 45% elongation at break against 11% for Aluminum 7050-T7451.
Thermal
Which conducts heat better, Aluminum 7050-T7451 or Copper C10100?
Copper C10100 conducts heat better: 391 W/m·K against 157 W/m·K for Aluminum 7050-T7451.
Which expands less with temperature?
Copper C10100 expands less: 16.9 µm/m·K against 23.5 µm/m·K for Aluminum 7050-T7451.