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Magnesium AZ31B-H24 vs. Plywood

Compare Magnesium AZ31B-H24 vs. Plywood strength, stiffness, weight and thermal properties.

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Magnesium AZ31B-H24Wrought
PlywoodNatural
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Mechanical
Yield strength220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stressnot given (tensile used)
Ultimate tensile strength290MPasourcetypical, H24, 0.5-6 mm41.4MPasourcemodulus of rupture (no direct tensile value)
Flexural strengthnot sourced41.4MPasourcestatic bending MOR (Douglas-fir); range 33.72-42.61 across species
Elongation at break13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√Anot sourced
Young's modulus (stiffness)44.8GPasourcetypical (handbook physical constant)7.45GPasourcestatic bending MOE of the panel (Douglas-fir); range 6.96-8.55 across species
Density1,769kg/m³sourcenominalnot sourced
Strength to weight124kN·m/kgnot sourced
Stiffness to weight25.3MN·m/kgnot sourced
Poisson's ratio0.35sourcetypical (handbook physical constant)not sourced
Shear modulus16.6GPanot sourced
Bulk modulus49.8GPanot sourced
Speed of sound5,032m/snot sourced
Thermal
Thermal conductivity76.9W/m·Ksourcetypical (temper/temperature not stated)0.12W/m·KsourceAPA-recommended design value (Douglas-fir plywood), as reported by FPL/ORNL
Thermal expansion26.8µm/m·Ksourcetypical (temperature range not stated)3.1–4.5µm/m·Ksourcebase material: solid wood parallel to grain, ovendry, range across species
100 mm part over a 50 °C swing134µm growth19µm growth7.05x less
Specific heat1,040J/kg·Ksourcetypical1,700J/kg·Ksourcebase material: solid wood (all species), 12% MC, 27 C
Heats up and cools (diffusivity)41.8mm²/snot sourced
Thermal shock resistance9,159W/mnot sourced
Max service temperature149°Csourcestated application limitnot sourced
Values forAZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMSDouglas-fir plywood sheathing (construction plywood per PS 1), static bending properties from USDA FPL Wood Handbook FPL-GTR-282 Ch. 12 Table 12-2 (Biblis 2000)

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 Magnesium AZ31B-H24 stronger than Plywood?

Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against tensile strength 41.4 MPa for Plywood (5.32x).

Which is stiffer, Magnesium AZ31B-H24 or Plywood?

Magnesium AZ31B-H24 is stiffer: Young's modulus 44.8 GPa against 7.45 GPa for Plywood, so the same part in Magnesium AZ31B-H24 deflects less under the same load.

Which conducts heat better, Magnesium AZ31B-H24 or Plywood?

Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.12 W/m·K for Plywood.

Which expands less with temperature?

Plywood expands less: 3.8 µm/m·K against 26.8 µm/m·K for Magnesium AZ31B-H24.

Among 59 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 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 SteelMagnesium AZ31B-H24
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 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 SteelBrickMagnesium AZ31B-H24
Strength against density

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