the Berasit Hebrew Dictionary

ברזל

'berezel' means “iron”. The first occurrence of the word is in Genesis 4, where a character by the name of Tubal-Cain is credited as the first worker in bronze and iron. 'berezel' is also mentioned several times in the book of Job.

For a thorough examination of various metals in the ancient Hebrew texts and how this ties in with the archaeological record, see metallurgy

Lexid 1270