Bare copper wire comprises hard drawn solid, hard drawn annealed, annealed solid round and annealed soft copper wires. Hard copper wire, drawn from copper wire rod at ambient atmosphere, has high conductivity and tensile strength. Annealed copper wire, obtained by heating hard drawn copper wire in vacuum furnace, has better flexibility and conductivity than hard drawn wire

Bare copper wire comprises hard drawn solid, hard drawn annealed, annealed solid round and annealed soft copper wires. Hard copper wire, drawn from copper wire rod at ambient atmosphere, has high conductivity and tensile strength. Annealed copper wire, obtained by heating hard drawn copper wire in vacuum furnace, has better flexibility and conductivity than hard drawn wire