Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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C12200 phosphorus-deoxidized copper (DHP, the air-conditioning and refrigeration tube copper), tube annealed to 0.050 mm grain size (OS050), 0.065 in. wall, copper.org typical values
Drywall
1/2 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. submittal
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C12200 Alloy (copper.org)Copper Development Associationarchived copyCopper C12200 · Yield strength: typical, 0.5% extension under load, 0.065 in. tubeCopper C12200 · Ultimate tensile strength: typical, 0.065 in. tubeCopper C12200 · Elongation at break: typical, 0.065 in. tubeCopper C12200 · Young's modulus (stiffness): typicalCopper C12200 · Density: nominalCopper C12200 · Thermal conductivity: typical, 20 °CCopper C12200 · Thermal expansion: typical, mean 20-100 °CCopper C12200 · Specific heat: typical, 20 °CCopper C12200 · Melting point: liquidus
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Mechanical Properties of Gypsum Board at Elevated TemperaturesUSDA Forest Products LaboratoryDrywall · Ultimate tensile strength: ambient range reported in review (Australian studies)Drywall · Young's modulus (stiffness): ambient range reported in review (Australian studies)
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GA-235-2023 Gypsum Board Typical Mechanical and Physical PropertiesGypsum AssociationDrywall · Compressive strength: typical, 70 F / 50% RHDrywall · Thermal expansion: typical, unrestrained, 3.3-32 CDrywall · Specific heat: typical (from ASHRAE Handbook of Fundamentals, per GA)
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Wieland-K19 (Cu-DHP, C12200) Data SheetWielandarchived copyCopper C12200 · Poisson's ratio: reference value at room temperature (Wieland-K19 = Cu-DHP = C12200, rolled products)
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Sheetrock Brand UltraLight Panels Submittal Sheet (WB2501)USGarchived copyDrywall · Max service temperature: manufacturer sustained-exposure limit
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Copper C12200 stronger than Drywall?
Copper C12200 is stronger: its yield strength is 69 MPa against tensile strength 1.5 MPa for Drywall (46x).
Which is stiffer, Copper C12200 or Drywall?
Copper C12200 is stiffer: Young's modulus 117 GPa against 1.5 GPa for Drywall, so the same part in Copper C12200 deflects less under the same load.
Thermal
Which expands less with temperature?
Drywall expands less: 16.7 µm/m·K against 16.9 µm/m·K for Copper C12200.