1100-O (annealed) commercially pure aluminium, Kaiser Aluminum Tube & Pipe Alloy 1100 Technical Data (Rev. 05/06), typical properties; specific heat from Hydro EN AW-1050A (99.5% Al) extruded-products datasheet (10/2018).
C11000 ETP copper, annealed to 0.050 mm grain size (OS050), 1 in. rod, copper.org typical values
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Aluminum 1100-O stronger than Copper C110?
Copper C110 is stronger: its yield strength is 69 MPa against 35 MPa for Aluminum 1100-O (1.97x).
Which is lighter, Aluminum 1100-O or Copper C110?
Aluminum 1100-O is lighter: 2,710 kg/m³ against 8,913 kg/m³ for Copper C110.
Which is stiffer, Aluminum 1100-O or Copper C110?
Copper C110 is stiffer: Young's modulus 117 GPa against 69 GPa for Aluminum 1100-O, so the same part in Copper C110 deflects less under the same load.
Which is lighter for the same job, Aluminum 1100-O or Copper C110?
For the same stiffness or strength: Aluminum 1100-O 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 1100-O
Copper C110
Stiff rod or tie (tension)
lighter
1.94x heavier
Stiff beam (bending)
lighter
2.52x heavier
Stiff panel or plate
lighter
2.76x heavier
Strong rod or tie
lighter
1.67x heavier
Strong beam
lighter
2.09x heavier
Strong panel or plate
lighter
2.34x 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 conducts heat better, Aluminum 1100-O or Copper C110?
Copper C110 conducts heat better: 391 W/m·K against 222 W/m·K for Aluminum 1100-O.
Which expands less with temperature?
Copper C110 expands less: 16.9 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.