Materials / Compare

Aluminum 2024-T351 vs. Ceramic Alumina 96%

Compare Aluminum 2024-T351 vs. Ceramic Alumina 96% strength, stiffness, weight and thermal properties.

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Aluminum 2024-T351Wrought
Ceramic Alumina 96%Sintered ceramic (pressed and fired)
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Mechanical
Yield strength324MPasourcetypical, 0.2% offset, .500 in dia specimennot given (tensile used)
Ultimate tensile strength469MPasourcetypical221MPasourcetypical tensile strength, 25 °C (ACMA Test #4)
Compressive strengthnot sourced2,068MPasourcetypical, 20 °C (ASTM-C773)
Flexural strengthnot sourced358MPasourceflexural strength (MOR), 20 °C (ASTM-F417)
Elongation at break19%sourcetypical, in 4Dnot sourced
Young's modulus (stiffness)73.1GPasourcetypical303GPasourcetypical, 20 °C (ASTM-C848)
Density2,770kg/m³sourcenominal3,720kg/m³sourcetypical (ASTM-C20)
Strength to weight117kN·m/kg1.97x higher59.4kN·m/kg
Stiffness to weight26.4MN·m/kg81.5MN·m/kg3.09x higher
Poisson's ratio0.33sourcetypical (handbook physical constant), all tempers0.21sourcetypical, 20 °C (ASTM-C848)
Shear modulus27.5GPa125GPa4.56x stiffer in shear
Bulk modulus71.7GPa174GPa
Speed of sound5,137m/s9,025m/s
Thermal
Thermal conductivity120W/m·Ksourcetypical, 20 °C24.7W/m·Ksourcetypical, 20 °C (ASTM-C408)
Thermal expansion22.9µm/m·Ksourcetypical, mean 20-100 °C8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372)
100 mm part over a 50 °C swing115µm growth41µm growth2.79x less
Specific heat875J/kg·Ksourcetypical, at 100 °C880J/kg·Ksourcetypical, 100 °C (ASTM-E1269)
Heats up and cools (diffusivity)49.5mm²/s6.56x faster7.55mm²/s
Thermal shock resistance15,561W/m8.97x more resistant1,736W/m
Melting point502–638°Csourcemelting rangenot sourced
Values for2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5JCoorsTek AD-96, nominal 96% Al2O3 sintered alumina, typical values; CoorsTek "Ceramic Seal Material Properties" (© 2018, 01899 F). AD-96 is the general 96% grade, not the ADS-96R substrate grade.

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 Ceramic Alumina 96%?

Aluminum 2024-T351 is stronger: its yield strength is 324 MPa against tensile strength 221 MPa for Ceramic Alumina 96% (47%).

Which is lighter, Aluminum 2024-T351 or Ceramic Alumina 96%?

Aluminum 2024-T351 is lighter: 2,770 kg/m³ against 3,720 kg/m³ for Ceramic Alumina 96%.

Which is stiffer, Aluminum 2024-T351 or Ceramic Alumina 96%?

Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 73.1 GPa for Aluminum 2024-T351, so the same part in Ceramic Alumina 96% deflects less under the same load.

Which is lighter for the same job, Aluminum 2024-T351 or Ceramic Alumina 96%?

For the same stiffness or strength: Aluminum 2024-T351 is lighter for a strong rod or tie, strong beam, strong panel or plate; Ceramic Alumina 96% is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.

Part that must beAluminum 2024-T351Ceramic Alumina 96%
Stiff rod or tie (tension)3.09x heavierlighter
Stiff beam (bending)1.52x heavierlighter
Stiff panel or plate20% heavierlighter
Strong rod or tielighter1.97x heavier
Strong beamlighter1.73x heavier
Strong panel or platelighter1.63x 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 Ceramic Alumina 96%?

Aluminum 2024-T351 conducts heat better: 120 W/m·K against 24.7 W/m·K for Ceramic Alumina 96%.

Which expands less with temperature?

Ceramic Alumina 96% expands less: 8.2 µm/m·K against 22.9 µm/m·K for Aluminum 2024-T351.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Aluminum 2024-T351Ceramic Alumina 96%
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Aluminum 2024-T351Ceramic Alumina 96%
Strength against density

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