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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Sources5 documents: Copper Development Association, Weir Minerals, Wieland, National Institute of Standards and Technology, Defense Technical Information Center
Copper C12200
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
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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Linatex Premium Rubber Spec Sheet (WMD0118, 2023)Weir MineralsRubber · Ultimate tensile strength: typicalRubber · Elongation at break: typicalRubber · Density: typical (specific gravity)Rubber · Max service temperature: continuous use operating range
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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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Compressibility of Natural Rubber at Pressures Below 500 kg/cm², J. Res. NBS 68A (1964)National Institute of Standards and Technologyarchived copyRubber · Poisson's ratio: government (NBS J. Res. 68A, 1964): computed by NBS for peroxide-cured gum NR vulcanizate, 25 °C, infinitesimal deformation (0.49 in the solver: the linear element locks as the ratio nears 0.5 (nearly incompressible).)Rubber · Specific heat: government (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C
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Thermal Conductivity of Soft Vulcanized Natural Rubber: Selected Values (AD 643325)Defense Technical Information Centerarchived copyRubber · Thermal conductivity: government selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C
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 Rubber?
Copper C12200 is stronger: its yield strength is 69 MPa against tensile strength 23 MPa for Rubber (3x).
Which is lighter, Copper C12200 or Rubber?
Rubber is lighter: 960 kg/m³ against 8,941 kg/m³ for Copper C12200.
Which is lighter for the same job, Copper C12200 or Rubber?
For the same stiffness or strength: Rubber is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Copper C12200
Rubber
Strong rod or tie
3.1x heavier
lighter
Strong beam
4.48x heavier
lighter
Strong panel or plate
5.38x heavier
lighter
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which is more ductile, Copper C12200 or Rubber?
Rubber stretches further before it breaks: 830% elongation at break against 45% for Copper C12200.
Thermal
Which conducts heat better, Copper C12200 or Rubber?
Copper C12200 conducts heat better: 339 W/m·K against 0.151 W/m·K for Rubber.