The thermal conductivity of brass is 109 watts per meter kelvin at 25 degrees Celsius. Generally, this measurement notes the ability of a material to conduct heat through it. Metals such as aluminum and tungsten and alloys such as brass and bronze are relatively thermally conductive. 

Diamond, being a pure material, has an extremely high thermal conductivity at approximately 1,000 watts per meter kelvin. In contrast, most liquids and gases, as well as many solids, are not as thermally conductive as brass. For example, atmospheric air, which is comprised of gaseous nitrogen, oxygen, carbon dioxide and other trace elements, has a thermal conductivity of 0.024 watt per meter kelvin.