Since relighting the blast furnace in Redcar last year, 2.5 million tonnes of steel has been made.
You can watch how it is made below.
(This video does not have audio.)
More top news
A young couple from Wallsend - Abbie Douglas and Sam Younganan - describe hearing gun shots in the Tunisian resort of Sousse
Temperatures on the rise from Tuesday. Some very warm and muggy nights to come
A British holidaymaker captured the scene on a Tunisian beach after a gunman opened fire at a beach resort in Sousse on Friday.