Materials / Compare

Drywall vs. Silicon

Compare Drywall vs. Silicon strength, stiffness, weight and thermal properties.

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DrywallNatural
SiliconGrown single crystal
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Mechanical
Yield strengthnot given (tensile used)not given (tensile used)
Ultimate tensile strength1–2MPasourceambient range reported in review (Australian studies)130MPasourcemodulus of rupture (bending fracture stress); brittle, no yield point
Compressive strength2.4MPasourcetypical, 70 F / 50% RHnot sourced
Flexural strengthnot sourced130MPasourcemodulus of rupture
Elongation at breaknot sourcednot sourced
Young's modulus (stiffness)1–2GPasourceambient range reported in review (Australian studies)131GPasourcetypical (single quoted value of an anisotropic crystal)
Densitynot sourced2,329kg/m³sourcetypical
Strength to weightnot sourced55.8kN·m/kg
Stiffness to weightnot sourced56.2MN·m/kg
Poisson's rationot sourced0.221sourcetypical
Shear modulusnot sourced53.6GPa
Bulk modulusnot sourced78.3GPa
Speed of soundnot sourced7,500m/s
Thermal
Thermal conductivitynot sourced163W/m·Ksourcetypical at 313 K (40 °C)
Thermal expansion16.7µm/m·Ksourcetypical, unrestrained, 3.3-32 C2.62µm/m·Ksourcetypical at 300 K
100 mm part over a 50 °C swing83.5µm growth13.1µm growth6.37x less
Specific heat1,090J/kg·Ksourcetypical (from ASHRAE Handbook of Fundamentals, per GA)732J/kg·Ksourcetypical
Heats up and cools (diffusivity)not sourced95.6mm²/s
Thermal shock resistancenot sourced48,095W/m
Melting pointnot sourced1,412°Csourcetypical
Max service temperature52°Csourcemanufacturer sustained-exposure limit300°Csourceproducer's maximum application temperature (optical components)
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. submittalSynthetic single-crystal silicon (cubic, diamond structure), Korth Kristalle (crystal grower) material data; Korth usually supplies Floating Zone (FZ) material, Czochralski (Cz) also offered. Silicon is elastically anisotropic; the producer quotes one modulus and the solver is isotropic.

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 Silicon?

Silicon is stronger: its tensile strength is 130 MPa against 1.5 MPa for Drywall (86.7x).

Which is stiffer, Drywall or Silicon?

Silicon is stiffer: Young's modulus 131 GPa against 1.5 GPa for Drywall, so the same part in Silicon deflects less under the same load.

Which expands less with temperature?

Silicon expands less: 2.62 µm/m·K against 16.7 µm/m·K for Drywall.

Among 72 materials

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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 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-4Ceramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Silicon
Strength against density

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