'Iron' in the Bible

He brought out the people who were in it, and put them [to work] with saws, iron picks, and axes. David dealt in this way with all the Ammonite cities. Then David and all the people returned to Jerusalem.

David prepared large quantities of iron to make nails for the doors of the gates and for the clamps (trusses), and more bronze than could be weighed;

Now listen, with great trouble I have prepared and provided for the house of the Lord 100,000 talents of gold, 1,000,000 talents of silver, and bronze and iron beyond weighing, for they are great in quantity. I have also prepared and provided timber and stone, and you may add to them.

As for the gold, the silver, the bronze, and the iron, there is no limit. So arise and begin working, and may the Lord be with you.”

So with all my ability I have provided for the house of my God the gold for the things of gold, silver for the things of silver, bronze for the things of bronze, iron for the things of iron, and wood for the things of wood, as well as onyx stones and stones to be inlaid, stones of antimony (a brittle, silvery-white metal) and stones of various colors, and all kinds of precious stones and alabaster in abundance.

and gave for the service of the house of God: 5,000 talents and 10,000 darics of gold, and 10,000 talents of silver, and 18,000 talents of bronze, and 100,000 talents of iron.