'Iron' in the Bible

He brought forth the people who were therein, and cut [them] with saws, and with iron picks, and with axes. David did so to all the cities of the children of Ammon. David and all the people returned to Jerusalem.

David prepared iron in abundance for the nails for the doors of the gates, and for the couplings; and brass in abundance without weight;

Now, behold, in my affliction I have prepared for the house of Yahweh one hundred thousand talents of gold, one million talents of silver, and brass and iron without weight; for it is in abundance. I have also prepared timber and stone; and you may add to them.

of the gold, the silver, and the brass, and the iron, there is no number. Arise and be doing, and may Yahweh be with you."

Now I have prepared with all my might for the house of my God the gold for the [things of] gold, and the silver for the [things of] silver, and the brass for the [things of] brass, the iron for the [things of] iron, and wood for the [things of] wood; onyx stones, and [stones] to be set, stones for inlaid work, and of various colors, and all kinds of precious stones, and marble stones in abundance.

and they gave for the service of the house of God of gold five thousand talents and ten thousand darics, and of silver ten thousand talents, and of brass eighteen thousand talents, and of iron a hundred thousand talents.