Aluminum 1100-O vs. Aluminum A380

Compare Aluminum 1100-O vs. Aluminum A380 strength, stiffness, weight and thermal properties.

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Mechanical
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Yield strength	35MPasourcetypical, O, 0.0625 in specimen	160MPasourcetypical, 25 °C
Ultimate tensile strength	90MPasourcetypical, O	320MPasourcetypical, 25 °C
Elongation at break	35%sourcetypical, O, in 4D	3.5%sourcetypical
Young's modulus (stiffness)	69GPasourcetypical	71GPasourcetypical, 25 °C
Density	2,710kg/m³sourcenominal, 20 °C	2,713kg/m³sourcetypical at 68 °F
Strength to weight	12.9kN·m/kg	59kN·m/kg4.57x higher
Stiffness to weight	25.5MN·m/kg	26.2MN·m/kg3% higher
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	5,116m/s
Thermal
Thermal conductivity	222W/m·Ksourcetypical, O, 20 °C	96.2W/m·Ksourcetypical at 68 °F
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	21.8µm/m·Ksourcetypical, 68-572 °F (20-300 °C)
100 mm part over a 50 °C swing	118µm growth	109µm growth8% less
Specific heat	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C	963J/kg·Ksourcetypical at 68 °F
Heats up and cools (diffusivity)	90.9mm²/s2.47x faster	36.8mm²/s
Thermal shock resistance	not sourced	not sourced
Melting point	640–655°Csourcemelting range	not sourced
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).	A380 aluminium high-pressure die-casting alloy, typical properties; Rheocast Company (aluminium die caster, Germantown WI) A380 alloy data page.

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 A380?

Aluminum A380 is stronger: its yield strength is 160 MPa against 35 MPa for Aluminum 1100-O (4.57x).

Which is lighter, Aluminum 1100-O or Aluminum A380?

Aluminum 1100-O is lighter: 2,710 kg/m³ against 2,713 kg/m³ for Aluminum A380.

Which is stiffer, Aluminum 1100-O or Aluminum A380?

Aluminum A380 is stiffer: Young's modulus 71 GPa against 69 GPa for Aluminum 1100-O, so the same part in Aluminum A380 deflects less under the same load.

Which is lighter for the same job, Aluminum 1100-O or Aluminum A380?

For the same stiffness or strength: Aluminum A380 is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 1100-O	Aluminum A380
Stiff rod or tie (tension)	3% heavier	lighter
Stiff beam (bending)	1% heavier	lighter
Stiff panel or plate	about equal	about equal
Strong rod or tie	4.57x heavier	lighter
Strong beam	2.75x heavier	lighter
Strong panel or plate	2.14x 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 A380?

Aluminum 1100-O conducts heat better: 222 W/m·K against 96.2 W/m·K for Aluminum A380.

Which expands less with temperature?

Aluminum A380 expands less: 21.8 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.

Among 72 materials

Stiffness against density

Strength against density