Aluminum 1100-O vs. Aluminum 6063-T6

Compare Aluminum 1100-O vs. Aluminum 6063-T6 strength, stiffness, weight and thermal properties.

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Mechanical
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Yield strength	35MPasourcetypical, O, 0.0625 in specimen	215MPasourcetypical, T6, 0.0625 in specimen
Ultimate tensile strength	90MPasourcetypical, O	240MPasourcetypical, T6
Elongation at break	35%sourcetypical, O, in 4D	12%sourcetypical, T6, in 4D
Young's modulus (stiffness)	69GPasourcetypical	69GPasourcetypical
Density	2,710kg/m³sourcenominal, 20 °C	2,700kg/m³sourcenominal, 20 °C
Strength to weight	12.9kN·m/kg	79.6kN·m/kg6.17x higher
Stiffness to weight	25.5MN·m/kg	25.6MN·m/kg
Poisson's ratio	not sourced	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	5,046m/s	5,055m/s
Thermal
Thermal conductivity	222W/m·Ksourcetypical, O, 20 °C	201W/m·Ksourcetypical, T6, 20 °C
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	23.4µm/m·Ksourcetypical, mean 20-100 °C
100 mm part over a 50 °C swing	118µm growth	117µm growth
Specific heat	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C	901J/kg·Ksourcetypical, 20 °C (Hydro EN AW-6063)
Heats up and cools (diffusivity)	90.9mm²/s10% faster	82.6mm²/s
Thermal shock resistance	not sourced	not sourced
Melting point	640–655°Csourcemelting range	615–655°Csourcemelting range
Values for	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).	6063-T6 extruded tube, Kaiser Aluminum Tube & Pipe Alloy 6063 Technical Data (Rev. 05/06), typical properties; specific heat from Hydro EN AW-6063 extruded-products datasheet (Rev.4, 03/2023).

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 Aluminum 6063-T6?

Aluminum 6063-T6 is stronger: its yield strength is 215 MPa against 35 MPa for Aluminum 1100-O (6.14x).

Which is lighter, Aluminum 1100-O or Aluminum 6063-T6?

Aluminum 6063-T6 is lighter: 2,700 kg/m³ against 2,710 kg/m³ for Aluminum 1100-O.

Which is stiffer, Aluminum 1100-O or Aluminum 6063-T6?

Aluminum 1100-O is stiffer: Young's modulus 69 GPa against 69 GPa for Aluminum 6063-T6, so the same part in Aluminum 1100-O deflects less under the same load.

Which is lighter for the same job, Aluminum 1100-O or Aluminum 6063-T6?

For the same stiffness or strength: Aluminum 6063-T6 is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 1100-O	Aluminum 6063-T6
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	6.17x heavier	lighter
Strong beam	3.37x heavier	lighter
Strong panel or plate	2.49x heavier	lighter

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 Aluminum 6063-T6?

Aluminum 1100-O conducts heat better: 222 W/m·K against 201 W/m·K for Aluminum 6063-T6.

Which expands less with temperature?

Aluminum 6063-T6 expands less: 23.4 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.

Among 72 materials

Stiffness against density

Strength against density