Aluminum vs. Aluminum 1100-O

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

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Mechanical
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Yield strength	276MPasourcetypical, 0.2% offset, .500 in dia specimen	35MPasourcetypical, O, 0.0625 in specimen
Ultimate tensile strength	310MPasourcetypical	90MPasourcetypical, O
Elongation at break	17%sourcetypical, in 4D, 0.500 in dia specimen	35%sourcetypical, O, in 4D
Young's modulus (stiffness)	68.3GPasourcetypical	69GPasourcetypical
Density	2,700kg/m³sourcenominal	2,710kg/m³sourcenominal, 20 °C
Strength to weight	102kN·m/kg7.91x higher	12.9kN·m/kg
Stiffness to weight	25.3MN·m/kg	25.5MN·m/kg
Poisson's ratio	0.33sourcetypical (handbook physical constant)	not sourced
Shear modulus	25.7GPa	not sourced
Bulk modulus	67GPa	not sourced
Speed of sound	5,030m/s	5,046m/s
Thermal
Thermal conductivity	167W/m·Ksourcetypical, 20 °C	222W/m·Ksourcetypical, O, 20 °C
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	23.6µm/m·Ksourcetypical, mean 20-100 °C
100 mm part over a 50 °C swing	118µm growth	118µm growth
Specific heat	896J/kg·Ksourcetypical, at 100 °C	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C
Heats up and cools (diffusivity)	69mm²/s	90.9mm²/s32% faster
Thermal shock resistance	19,159W/m	not sourced
Melting point	582–652°Csourcesolidus-liquidus	640–655°Csourcemelting range
Values for	6061-T6/T651, Kaiser Aluminum typical properties (sheet, coil & plate datasheet); Poisson from MIL-HDBK-5J	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).

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 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 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.

Among 72 materials

Stiffness against density

Strength against density