'Iron' in the Bible

For see, this day have I made you a walled town, and an iron pillar, and walls of brass, against all the land, against the kings of Judah, against its captains, against its priests, and against the people of the land.

All of them are turned away, going about with false stories; they are brass and iron: they are all workers of deceit.

To the order which I gave your fathers on the day when I took them out of the land of Egypt, out of the oven of iron, saying, Give ear to my voice, and do all the orders I have given you: so you will be my people, and I will be your God:

Is it possible for iron to be broken; even iron from the north, and brass?

The sin of Judah is recorded with a pen of iron, and with the sharp point of a jewel it is cut on their hearts of stone, and on the horns of their altars for a sign to them:

Go and say to Hananiah, This is what the Lord has said: Yokes of wood have been broken by you, but in their place I will make yokes of iron.

For the Lord of armies, the God of Israel, has said: I have put a yoke of iron on the necks of all these nations, making them servants to Nebuchadnezzar, king of Babylon; and they are to be his servants: and in addition I have given him the beasts of the field.

And he put out Zedekiah's eyes; and the king of Babylon, chaining him in iron bands, took him to Babylon, and put him in prison till the day of his death.