The present invention concerns electrical conductors comprising armchair single-wall carbon nanotubes. Such electrical conductors made by the invention are metallic, i.e., they will conduct electrical charges with a relatively low resistance. The amount of armchair single-wall carbon nanotubes in the electrical conductor can be greater than 10%, greater than 30%, greater than 50%, greater than 75%, and greater than 90%, of the single-wall carbon nanotubes in the electrical conductor.