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Ceramic Aluminum Nitride vs. Magnesium AZ31B-H24

Compare Ceramic Aluminum Nitride vs. Magnesium AZ31B-H24 strength, stiffness, weight and thermal properties.

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Ceramic Aluminum NitrideSintered ceramic (pressed and fired)
Magnesium AZ31B-H24Wrought
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Mechanical
Yield strengthnot sourced220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress
Ultimate tensile strengthnot sourced290MPasourcetypical, H24, 0.5-6 mm
Flexural strength310MPasource3-point bending strength (JIS R 1601)not sourced
Elongation at breaknot sourced13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A
Young's modulus (stiffness)320GPasourcetypical (JIS R 1602)44.8GPasourcetypical (handbook physical constant)
Density3,400kg/m³sourcetypical (JIS R 1634)1,769kg/m³sourcenominal
Strength to weightnot sourced124kN·m/kg
Stiffness to weight94.1MN·m/kg3.72x higher25.3MN·m/kg
Poisson's ratio0.24sourcetypical (JIS R 1602)0.35sourcetypical (handbook physical constant)
Shear modulus129GPa7.78x stiffer in shear16.6GPa
Bulk modulus205GPa49.8GPa
Speed of sound9,701m/s5,032m/s
Thermal
Thermal conductivity150W/m·Ksourcetypical (JIS R 1611)76.9W/m·Ksourcetypical (temper/temperature not stated)
Thermal expansion4.6µm/m·Ksourcemean, 40-400 °C (JIS R 1618)26.8µm/m·Ksourcetypical (temperature range not stated)
100 mm part over a 50 °C swing23µm growth5.83x less134µm growth
Specific heat710J/kg·Ksourcetypical (JIS R 1611)1,040J/kg·Ksourcetypical
Heats up and cools (diffusivity)62.1mm²/s49% faster41.8mm²/s
Thermal shock resistancenot sourced9,159W/m
Max service temperaturenot sourced149°Csourcestated application limit
Values forKYOCERA AN216A dense sintered aluminium nitride, typical values; KYOCERA Fineceramics Europe data sheet 2023.04.03AZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMS

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

Which is lighter, Ceramic Aluminum Nitride or Magnesium AZ31B-H24?

Magnesium AZ31B-H24 is lighter: 1,769 kg/m³ against 3,400 kg/m³ for Ceramic Aluminum Nitride.

Which is stiffer, Ceramic Aluminum Nitride or Magnesium AZ31B-H24?

Ceramic Aluminum Nitride is stiffer: Young's modulus 320 GPa against 44.8 GPa for Magnesium AZ31B-H24, so the same part in Ceramic Aluminum Nitride deflects less under the same load.

Which is lighter for the same job, Ceramic Aluminum Nitride or Magnesium AZ31B-H24?

For the same stiffness or strength: Ceramic Aluminum Nitride is lighter for a stiff rod or tie (tension), stiff beam (bending).

Part that must beCeramic Aluminum NitrideMagnesium AZ31B-H24
Stiff rod or tie (tension)lighter3.72x heavier
Stiff beam (bending)lighter39% heavier
Stiff panel or plateabout equalabout equal

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 Aluminum Nitride or Magnesium AZ31B-H24?

Ceramic Aluminum Nitride conducts heat better: 150 W/m·K against 76.9 W/m·K for Magnesium AZ31B-H24.

Which expands less with temperature?

Ceramic Aluminum Nitride expands less: 4.6 µm/m·K against 26.8 µm/m·K for Magnesium AZ31B-H24.

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 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Zinc 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 Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Ceramic Aluminum NitrideMagnesium AZ31B-H24
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 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Zinc 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-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Magnesium AZ31B-H24
Strength against density

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