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Plastic TPU vs. Wood

Compare Plastic TPU vs. Wood strength, stiffness, weight and thermal properties.

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Plastic TPU3D printed (FDM)
WoodNatural
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Mechanical
Yield strengthnot given (tensile used)not given (tensile used)
Ultimate tensile strength23.7MPasourcetypical, stress at break99MPasourcemodulus of rupture (no direct tensile value)
Compressive strengthnot sourced46.6MPasourcecompression parallel to grain (maximum crushing strength), 12% MC
Flexural strength4.1MPasourcetypical99MPasourcemodulus of rupture (static bending), 12% MC
Elongation at breaknot sourcednot sourced
Young's modulus (stiffness)0.067GPasourcetypical12.5GPasourcebending MOE, parallel to grain
Density1,220kg/m³sourcetypicalnot sourced
Strength to weight19.4kN·m/kgnot sourced
Stiffness to weight0.0549MN·m/kgnot sourced
Poisson's rationot sourced0.35sourcemu_LR (red oak group, ~12% MC)
Shear modulusnot sourced4.63GPa
Bulk modulusnot sourced13.9GPa
Speed of sound234m/snot sourced
Thermal
Thermal conductivitynot sourced0.18W/m·Ksourceacross grain, 12% MC (Table 4-7, approximate)
Thermal expansionnot sourced3.1–4.5µm/m·Ksourceparallel to grain, ovendry wood, range across species
100 mm part over a 50 °C swingnot sourced19µm growth
Specific heatnot sourced1,700J/kg·Ksourcesolid wood (all species), 12% MC, 27 C
Heats up and cools (diffusivity)not sourcednot sourced
Thermal shock resistancenot sourced244W/m
Melting point217°Csourcetypicalnot sourced
Max service temperature50.3°CsourceHDT 0.455 MPa (printed specimens)not sourced
Values forUltimaker TPU 95A, 3D-printed specimens, XY (flat); Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS (file v5.00), April 29, 2022.Northern red oak (Quercus rubra), clear straight-grained specimens at 12% MC, parallel to grain unless stated; USDA FPL Wood Handbook FPL-GTR-282 (2021) Ch. 4 and Ch. 5

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.

Plastic TPU is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is Plastic TPU stronger than Wood?

Wood is stronger: its tensile strength is 99 MPa against 23.7 MPa for Plastic TPU (4.18x).

Which is stiffer, Plastic TPU or Wood?

Wood is stiffer: Young's modulus 12.5 GPa against 0.067 GPa for Plastic TPU, so the same part in Wood deflects less under the same load.

Among 59 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic 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 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 SteelPlastic TPU
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic 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 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 SteelBrickPlastic TPU
Strength against density

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