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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Sources4 documents: Kaiser Aluminum, U.S. Department of Defense, Hydro
Aluminum
6061-T6/T651, Kaiser Aluminum typical properties (sheet, coil & plate datasheet); Poisson from MIL-HDBK-5J
Aluminum 1100-O
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).
1
Alloy 6061 Sheet, Coil & Plate Technical DataKaiser Aluminumarchived copyAluminum · Yield strength: typical, 0.2% offset, .500 in dia specimenAluminum · Ultimate tensile strength: typicalAluminum · Elongation at break: typical, in 4D, 0.500 in dia specimenAluminum · Young's modulus (stiffness): typicalAluminum · Density: nominalAluminum · Thermal conductivity: typical, 20 °CAluminum · Thermal expansion: typical, mean 20-100 °CAluminum · Specific heat: typical, at 100 °CAluminum · Melting point: solidus-liquidus
2
Alloy 1100 Tube & Pipe Technical Data, Rev. 05/06Kaiser Aluminumarchived copyAluminum 1100-O · Yield strength: typical, O, 0.0625 in specimenAluminum 1100-O · Ultimate tensile strength: typical, OAluminum 1100-O · Elongation at break: typical, O, in 4DAluminum 1100-O · Young's modulus (stiffness): typicalAluminum 1100-O · Density: nominal, 20 °CAluminum 1100-O · Thermal conductivity: typical, O, 20 °CAluminum 1100-O · Thermal expansion: typical, mean 20-100 °CAluminum 1100-O · Melting point: melting range
3
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefenseAluminum · Poisson's ratio: typical (handbook physical constant)
4
Technical Datasheet, Extruded Products: Alloy EN AW-1050AHydroAluminum 1100-O · Specific heat: base material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C
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 stronger than Aluminum 1100-O?
Aluminum is stronger: its yield strength is 276 MPa against 35 MPa for Aluminum 1100-O (7.89x).
Which is lighter, Aluminum or Aluminum 1100-O?
Aluminum is lighter: 2,700 kg/m³ against 2,710 kg/m³ for Aluminum 1100-O.
Which is stiffer, Aluminum or Aluminum 1100-O?
Aluminum 1100-O is stiffer: Young's modulus 69 GPa against 68.3 GPa for Aluminum, so the same part in Aluminum 1100-O deflects less under the same load.
Which is lighter for the same job, Aluminum or Aluminum 1100-O?
For the same stiffness or strength: Aluminum is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum
Aluminum 1100-O
Stiff rod or tie (tension)
about equal
about equal
Stiff beam (bending)
about equal
about equal
Stiff panel or plate
about equal
about equal
Strong rod or tie
lighter
7.91x heavier
Strong beam
lighter
3.98x heavier
Strong panel or plate
lighter
2.82x 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 or Aluminum 1100-O?
Aluminum 1100-O stretches further before it breaks: 35% elongation at break against 17% for Aluminum.
Thermal
Which conducts heat better, Aluminum or Aluminum 1100-O?
Aluminum 1100-O conducts heat better: 222 W/m·K against 167 W/m·K for Aluminum.
Which expands less with temperature?
Aluminum expands less: 23.6 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.