Genesis mentions that Tubal-Cain, seven generations from Adam, was "an instructor of every artificer in brass and iron."

A remarkable iron pillar, dating to about A.D. 400, remains standing today in Delhi, India. This solid shaft of wrought iron is about 7 1/4 m high by 40 cm in diameter. Corrosion to the pillar has been minimal although it has been exposed to the weather since its creation.
A Periodic Table of the Elements at Los Alamos National Laboratory