Copper.org
Specific Gravity. 8.91 (2) Electrical Conductivity % IACS at 68°F. 100. Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F. 224. Coefficient of Thermal Expansion 68-572 10 to -6 power per °F (68 – 572°F) 9.8. Specific Heat Capacity Btu/ lb /°F at 68°F.