Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources5 documents: Kaiser Aluminum, Daiki Aluminium Industry, S.S. Aluminum, U.S. Department of Defense
Aluminum 2024-T351
2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5J
Aluminum ADC12
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.
1
Alloy 2024 Sheet, Coil & Plate Technical DataKaiser Aluminumarchived copyAluminum 2024-T351 · Yield strength: typical, 0.2% offset, .500 in dia specimenAluminum 2024-T351 · Ultimate tensile strength: typicalAluminum 2024-T351 · Elongation at break: typical, in 4DAluminum 2024-T351 · Young's modulus (stiffness): typicalAluminum 2024-T351 · Density: nominalAluminum 2024-T351 · Thermal conductivity: typical, 20 °CAluminum 2024-T351 · Thermal expansion: typical, mean 20-100 °CAluminum 2024-T351 · Specific heat: typical, at 100 °CAluminum 2024-T351 · Melting point: melting range
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NA Alloys Product DataDaiki Aluminium IndustryAluminum ADC12 · Yield strength: one test result, 0.2% proof stress, as cast, ASTM tensile bar (Daiki)Aluminum ADC12 · Ultimate tensile strength: one test result, as cast, ASTM tensile bar (Daiki)Aluminum ADC12 · Elongation at break: one test result, as cast, ASTM tensile bar (Daiki)
3
Die-Casting Alloys (ダイカスト用合金)S.S. AluminumAluminum ADC12 · Young's modulus (stiffness): standard value (S.S.Aluminum)
4
DIK365 Product DataDaiki Aluminium IndustryAluminum ADC12 · Density: measured (Daiki)Aluminum ADC12 · Thermal conductivity: measured on specimens cut from a 50 x 100 x 5 mm flat die casting (Daiki)Aluminum ADC12 · Thermal expansion: measured, temperature range not stated (Daiki)Aluminum ADC12 · Specific heat: measured (Daiki)Aluminum ADC12 · Melting point: solidus-liquidus (Daiki)
5
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefenseAluminum 2024-T351 · Poisson's ratio: typical (handbook physical constant), all tempers
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
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 is more ductile, Aluminum 2024-T351 or Aluminum ADC12?
Aluminum 2024-T351 stretches further before it breaks: 19% elongation at break against 2.3% for Aluminum ADC12.
Thermal
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.