Materials / Compare

Drywall vs. Plastic POM/Acetal

Compare Drywall vs. Plastic POM/Acetal strength, stiffness, weight and thermal properties.

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DrywallNatural
Plastic POM/AcetalBulk polymer (molded or machined)
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Mechanical
Yield strengthnot given (tensile used)69MPasourcetypical (single ASTM D638 tensile strength)
Ultimate tensile strength1–2MPasourceambient range reported in review (Australian studies)69MPasourcetypical
Compressive strength2.4MPasourcetypical, 70 F / 50% RH124MPasourcecompressive stress at 10% deformation
Flexural strengthnot sourced99MPasourceflexural yield strength, typical
Elongation at breaknot sourced75%sourcetypical
Young's modulus (stiffness)1–2GPasourceambient range reported in review (Australian studies)2.8GPasourcetypical
Densitynot sourced1,420kg/m³sourcetypical (DuPont product information for Delrin 100 NC010; 'The data listed here fall within the normal range of product properties')
Strength to weightnot sourced48.6kN·m/kg
Stiffness to weightnot sourced1.97MN·m/kg
Poisson's rationot sourced0.35sourcetypical
Shear modulusnot sourced1.04GPa
Bulk modulusnot sourced3.11GPa
Speed of soundnot sourced1,404m/s
Thermal
Thermal conductivitynot sourced0.4W/m·Ksourcetypical
Thermal expansion16.7µm/m·Ksourcetypical, unrestrained, 3.3-32 C122µm/m·Ksourcemean, 29 to 60 °C
100 mm part over a 50 °C swing83.5µm growth7.31x less610µm growth
Specific heat1,090J/kg·Ksourcetypical (from ASHRAE Handbook of Fundamentals, per GA)1,465J/kg·Ksourceaverage -18 to 100 °C, Delrin acetal resins (not grade-specific)
Heats up and cools (diffusivity)not sourced0.192mm²/s
Thermal shock resistancenot sourced52.5W/m
Melting pointnot sourced175°Csourcecrystalline melting point
Max service temperature52°Csourcemanufacturer sustained-exposure limit125°CsourceHDT 1.8 MPa (annealed)
Values for1/2 in. (12.7 mm) regular gypsum board (ASTM C1396), Gypsum Association GA-235-2019 typical/minimum properties; tensile and E from USDA FPL-co-authored review; service limit from USG Sheetrock 1/2 in. submittalDuPont Delrin 100 acetal homopolymer, Table 2 'Typical Properties of Delrin Acetal Resins' (ASTM methods), Delrin Design Guide Module III hosted on delrin.com

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 Drywall stronger than Plastic POM/Acetal?

Plastic POM/Acetal is stronger: its yield strength is 69 MPa against tensile strength 1.5 MPa for Drywall (46x).

Which is stiffer, Drywall or Plastic POM/Acetal?

Plastic POM/Acetal is stiffer: Young's modulus 2.8 GPa against 1.5 GPa for Drywall, so the same part in Plastic POM/Acetal deflects less under the same load.

Which expands less with temperature?

Drywall expands less: 16.7 µm/m·K against 122 µm/m·K for Plastic POM/Acetal.

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 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic 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 POM/Acetal
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 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic 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 POM/Acetal
Strength against density

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