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Ceramic Alumina 96% vs. Steel AISI 1045

Compare Ceramic Alumina 96% vs. Steel AISI 1045 strength, stiffness, weight and thermal properties.

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Ceramic Alumina 96%Sintered ceramic (pressed and fired)
Steel AISI 1045Wrought
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Mechanical
Yield strengthnot given (tensile used)531MPasourceproducer-stated, cold drawn
Ultimate tensile strength221MPasourcetypical tensile strength, 25 °C (ACMA Test #4)627MPasourceproducer-stated, cold drawn
Compressive strength2,068MPasourcetypical, 20 °C (ASTM-C773)not sourced
Flexural strength358MPasourceflexural strength (MOR), 20 °C (ASTM-F417)not sourced
Elongation at breaknot sourced12%sourcein 2 in (50.8 mm)
Young's modulus (stiffness)303GPasourcetypical, 20 °C (ASTM-C848)210GPasourcetypical
Density3,720kg/m³sourcetypical (ASTM-C20)7,800kg/m³sourcetypical
Strength to weight59.4kN·m/kg68.1kN·m/kg15% higher
Stiffness to weight81.5MN·m/kg3.03x higher26.9MN·m/kg
Poisson's ratio0.21sourcetypical, 20 °C (ASTM-C848)0.3sourcetypical
Shear modulus125GPa1.55x stiffer in shear80.8GPa
Bulk modulus174GPa175GPa
Speed of sound9,025m/s5,189m/s
Thermal
Thermal conductivity24.7W/m·Ksourcetypical, 20 °C (ASTM-C408)40–45W/m·Ksourcetypical range, ambient
Thermal expansion8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372)12µm/m·Ksourcetypical, mean 20-300 °C
100 mm part over a 50 °C swing41µm growth46% less60µm growth
Specific heat880J/kg·Ksourcetypical, 100 °C (ASTM-E1269)460–480J/kg·Ksourcetypical range, 50/100 °C
Heats up and cools (diffusivity)7.55mm²/s11.6mm²/s1.54x faster
Thermal shock resistance1,736W/m6,269W/m3.61x more resistant
Values forCoorsTek 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.AISI 1045 cold drawn bar (Niagara LaSalle) for mechanical; Ovako C45 (lists 'SAE 1045' as a similar designation) for physical constants

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 Ceramic Alumina 96% stronger than Steel AISI 1045?

Steel AISI 1045 is stronger: its yield strength is 531 MPa against tensile strength 221 MPa for Ceramic Alumina 96% (2.4x).

Which is lighter, Ceramic Alumina 96% or Steel AISI 1045?

Ceramic Alumina 96% is lighter: 3,720 kg/m³ against 7,800 kg/m³ for Steel AISI 1045.

Which is stiffer, Ceramic Alumina 96% or Steel AISI 1045?

Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 210 GPa for Steel AISI 1045, so the same part in Ceramic Alumina 96% deflects less under the same load.

Which is lighter for the same job, Ceramic Alumina 96% or Steel AISI 1045?

For the same stiffness or strength: Ceramic Alumina 96% is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Steel AISI 1045 is lighter for a strong rod or tie.

Part that must beCeramic Alumina 96%Steel AISI 1045
Stiff rod or tie (tension)lighter3.03x heavier
Stiff beam (bending)lighter2.52x heavier
Stiff panel or platelighter2.37x heavier
Strong rod or tie15% heavierlighter
Strong beamlighter17% heavier
Strong panel or platelighter35% 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, Ceramic Alumina 96% or Steel AISI 1045?

Steel AISI 1045 conducts heat better: 42.5 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 12 µm/m·K for Steel AISI 1045.

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 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 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 GF30Ceramic Alumina 96%Steel AISI 1045
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 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 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 GF30Ceramic Alumina 96%Steel AISI 1045
Strength against density

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