Aluminum 1100-O vs. Aluminum ADC12

Compare Aluminum 1100-O vs. Aluminum ADC12 strength, stiffness, weight and thermal properties.

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Mechanical
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Yield strength	35MPasourcetypical, O, 0.0625 in specimen	149MPasourceone test result, 0.2% proof stress, as cast, ASTM tensile bar (Daiki)
Ultimate tensile strength	90MPasourcetypical, O	345MPasourceone test result, as cast, ASTM tensile bar (Daiki)
Elongation at break	35%sourcetypical, O, in 4D	2.3%sourceone test result, as cast, ASTM tensile bar (Daiki)
Young's modulus (stiffness)	69GPasourcetypical	79.8GPasourcestandard value (S.S.Aluminum)
Density	2,710kg/m³sourcenominal, 20 °C	2,680kg/m³sourcemeasured (Daiki)
Strength to weight	12.9kN·m/kg	55.6kN·m/kg4.3x higher
Stiffness to weight	25.5MN·m/kg	29.8MN·m/kg17% 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	5,457m/s
Thermal
Thermal conductivity	222W/m·Ksourcetypical, O, 20 °C	125W/m·Ksourcemeasured on specimens cut from a 50 x 100 x 5 mm flat die casting (Daiki)
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	21µm/m·Ksourcemeasured, temperature range not stated (Daiki)
100 mm part over a 50 °C swing	118µm growth	105µm growth12% less
Specific heat	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C	911J/kg·Ksourcemeasured (Daiki)
Heats up and cools (diffusivity)	90.9mm²/s1.78x faster	51.2mm²/s
Thermal shock resistance	not sourced	not sourced
Melting point	640–655°Csourcemelting range	515–582°Csourcesolidus-liquidus (Daiki)
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).	JIS ADC12 (Al-Si-Cu, about A383 / EN AC-46100) high-pressure die-casting alloy, as cast; physical properties from Daiki Aluminium Industry (ADC12 ingot producer) measured values; modulus from S.S.Aluminum (ADC12 ingot producer) standard values.

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 ADC12?

Aluminum ADC12 is stronger: its yield strength is 149 MPa against 35 MPa for Aluminum 1100-O (4.26x).

Which is lighter, Aluminum 1100-O or Aluminum ADC12?

Aluminum ADC12 is lighter: 2,680 kg/m³ against 2,710 kg/m³ for Aluminum 1100-O.

Which is stiffer, Aluminum 1100-O or Aluminum ADC12?

Aluminum ADC12 is stiffer: Young's modulus 79.8 GPa against 69 GPa for Aluminum 1100-O, so the same part in Aluminum ADC12 deflects less under the same load.

Which is lighter for the same job, Aluminum 1100-O or Aluminum ADC12?

For the same stiffness or strength: Aluminum ADC12 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 1100-O	Aluminum ADC12
Stiff rod or tie (tension)	17% heavier	lighter
Stiff beam (bending)	9% heavier	lighter
Stiff panel or plate	6% heavier	lighter
Strong rod or tie	4.3x heavier	lighter
Strong beam	2.66x heavier	lighter
Strong panel or plate	2.09x 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 ADC12?

Aluminum 1100-O conducts heat better: 222 W/m·K against 125 W/m·K for Aluminum ADC12.

Which expands less with temperature?

Aluminum ADC12 expands less: 21 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.

Among 72 materials

Stiffness against density

Strength against density