Aluminum 2024-T351 vs. Aluminum ADC12

Compare Aluminum 2024-T351 vs. Aluminum ADC12 strength, stiffness, weight and thermal properties.

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Aluminum 2024-T351Wrought

Mechanical
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Yield strength	324MPasourcetypical, 0.2% offset, .500 in dia specimen	149MPasourceone test result, 0.2% proof stress, as cast, ASTM tensile bar (Daiki)
Ultimate tensile strength	469MPasourcetypical	345MPasourceone test result, as cast, ASTM tensile bar (Daiki)
Elongation at break	19%sourcetypical, in 4D	2.3%sourceone test result, as cast, ASTM tensile bar (Daiki)
Young's modulus (stiffness)	73.1GPasourcetypical	79.8GPasourcestandard value (S.S.Aluminum)
Density	2,770kg/m³sourcenominal	2,680kg/m³sourcemeasured (Daiki)
Strength to weight	117kN·m/kg2.1x higher	55.6kN·m/kg
Stiffness to weight	26.4MN·m/kg	29.8MN·m/kg13% higher
Poisson's ratio	0.33sourcetypical (handbook physical constant), all tempers	not sourced
Shear modulus	27.5GPa	not sourced
Bulk modulus	71.7GPa	not sourced
Speed of sound	5,137m/s	5,457m/s
Thermal
Thermal conductivity	120W/m·Ksourcetypical, 20 °C	125W/m·Ksourcemeasured on specimens cut from a 50 x 100 x 5 mm flat die casting (Daiki)
Thermal expansion	22.9µm/m·Ksourcetypical, mean 20-100 °C	21µm/m·Ksourcemeasured, temperature range not stated (Daiki)
100 mm part over a 50 °C swing	115µm growth	105µm growth9% less
Specific heat	875J/kg·Ksourcetypical, at 100 °C	911J/kg·Ksourcemeasured (Daiki)
Heats up and cools (diffusivity)	49.5mm²/s	51.2mm²/s3% faster
Thermal shock resistance	15,561W/m	not sourced
Melting point	502–638°Csourcemelting range	515–582°Csourcesolidus-liquidus (Daiki)
Values for	2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5J	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 2024-T351 stronger than Aluminum ADC12?

Aluminum 2024-T351 is stronger: its yield strength is 324 MPa against 149 MPa for Aluminum ADC12 (2.17x).

Which is lighter, Aluminum 2024-T351 or Aluminum ADC12?

Aluminum ADC12 is lighter: 2,680 kg/m³ against 2,770 kg/m³ for Aluminum 2024-T351.

Which is stiffer, Aluminum 2024-T351 or Aluminum ADC12?

Aluminum ADC12 is stiffer: Young's modulus 79.8 GPa against 73.1 GPa for Aluminum 2024-T351, so the same part in Aluminum ADC12 deflects less under the same load.

Which is lighter for the same job, Aluminum 2024-T351 or Aluminum ADC12?

For the same stiffness or strength: Aluminum 2024-T351 is lighter for a strong rod or tie, strong beam, strong panel or plate; Aluminum ADC12 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.

Part that must be	Aluminum 2024-T351	Aluminum ADC12
Stiff rod or tie (tension)	13% heavier	lighter
Stiff beam (bending)	8% heavier	lighter
Stiff panel or plate	6% heavier	lighter
Strong rod or tie	lighter	2.1x heavier
Strong beam	lighter	1.62x heavier
Strong panel or plate	lighter	43% 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 2024-T351 or Aluminum ADC12?

Aluminum ADC12 conducts heat better: 125 W/m·K against 120 W/m·K for Aluminum 2024-T351.

Which expands less with temperature?

Aluminum ADC12 expands less: 21 µm/m·K against 22.9 µm/m·K for Aluminum 2024-T351.

Among 72 materials

Stiffness against density

Strength against density