'Iron' in the Bible

"Now therefore send me a man skillful to work in gold, and in silver, and in brass, and in iron, and in purple, and crimson, and blue, and who knows how to engrave [all kinds of] engravings, [to be] with the skillful men who are with me in Judah and in Jerusalem, whom David my father did provide.

the son of a woman of the daughters of Dan; and his father was a man of Tyre, skillful to work in gold, and in silver, in brass, in iron, in stone, and in timber, in purple, in blue, and in fine linen, and in crimson, also to engrave any kind of engraving, and to devise any device; that there may be a place appointed to him with your skillful men, and with the skillful men of my lord David your father.

Zedekiah the son of Chenaanah made him horns of iron, and said, "Thus says Yahweh, 'With these you shall push the Syrians, until they are consumed.'"

The king and Jehoiada gave it to such as did the work of the service of the house of Yahweh; and they hired masons and carpenters to restore the house of Yahweh, and also such as worked iron and brass to repair the house of Yahweh.