'Brass' in the Bible

So Eleazar the priest took the brass vessels which had been offered by those who were burned up, and they were hammered out to make a cover for the altar:

Then the LORD instructed Moses, "Make a poisonous serpent out of brass and fasten it to a pole. Anyone who has been bitten and who looks at it will live."

And Moses made a serpent of brass, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of brass, he lived.

Only the gold, and the silver, the brass, the iron, the tin, and the lead,