Aluminum 1100-O vs. Aluminum 7050-T7451

Compare Aluminum 1100-O vs. Aluminum 7050-T7451 strength, stiffness, weight and thermal properties.

Change either side

Mechanical
Try it on a partA sample part to run stress or thermal on, free in your browser	Open in LessCAD	Open in LessCAD
Yield strength	35MPasourcetypical, O, 0.0625 in specimen	469MPasourcetypical, longitudinal, 0.2% offset
Ultimate tensile strength	90MPasourcetypical, O	524MPasourcetypical, longitudinal
Elongation at break	35%sourcetypical, O, in 4D	11%sourcetypical, longitudinal
Young's modulus (stiffness)	69GPasourcetypical	70.3GPasourcetypical
Density	2,710kg/m³sourcenominal, 20 °C	2,830kg/m³sourcenominal
Strength to weight	12.9kN·m/kg	166kN·m/kg12.8x higher
Stiffness to weight	25.5MN·m/kg2% higher	24.8MN·m/kg
Poisson's ratio	not sourced	0.33sourcetypical (handbook physical constant)
Shear modulus	not sourced	26.4GPa
Bulk modulus	not sourced	68.9GPa
Speed of sound	5,046m/s	4,984m/s
Thermal
Thermal conductivity	222W/m·Ksourcetypical, O, 20 °C	157W/m·Ksourcetypical, 20 °C
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	23.5µm/m·Ksourcetypical, mean 20-100 °C
100 mm part over a 50 °C swing	118µm growth	118µm growth
Specific heat	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C	860J/kg·Ksourcetypical, at 100 °C
Heats up and cools (diffusivity)	90.9mm²/s41% faster	64.5mm²/s
Thermal shock resistance	not sourced	29,862W/m
Melting point	640–655°Csourcemelting range	524–635°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).	7050-T7451 plate, Kaiser Aluminum sheet, coil & plate typical datasheet (longitudinal); Poisson from MIL-HDBK-5J

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 7050-T7451?

Aluminum 7050-T7451 is stronger: its yield strength is 469 MPa against 35 MPa for Aluminum 1100-O (13.4x).

Which is lighter, Aluminum 1100-O or Aluminum 7050-T7451?

Aluminum 1100-O is lighter: 2,710 kg/m³ against 2,830 kg/m³ for Aluminum 7050-T7451.

Which is stiffer, Aluminum 1100-O or Aluminum 7050-T7451?

Aluminum 7050-T7451 is stiffer: Young's modulus 70.3 GPa against 69 GPa for Aluminum 1100-O, so the same part in Aluminum 7050-T7451 deflects less under the same load.

Which is lighter for the same job, Aluminum 1100-O or Aluminum 7050-T7451?

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; Aluminum 7050-T7451 is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 1100-O	Aluminum 7050-T7451
Stiff rod or tie (tension)	lighter	2% heavier
Stiff beam (bending)	lighter	3% heavier
Stiff panel or plate	lighter	4% heavier
Strong rod or tie	12.8x heavier	lighter
Strong beam	5.4x heavier	lighter
Strong panel or plate	3.51x 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 7050-T7451?

Aluminum 1100-O conducts heat better: 222 W/m·K against 157 W/m·K for Aluminum 7050-T7451.

Which expands less with temperature?

Aluminum 7050-T7451 expands less: 23.5 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.

Among 72 materials

Stiffness against density

Strength against density