Cold Rolling mill
Hallo! I would suggest that the steel, after manufacturing, should not only come out in bars, but also in the form of coils. These should be the raw material as well. In professional jargon, they are referred to as hot rolled coils. This hot rolled coil is then cleaned again in a cold rolling mill through a pickling process and cold rolled to a specific thickness using a rolling mill stand. Subsequently, these coils are transported to other facilities, such as a galvanizing plant, using specialized vehicles and trailers (link: https://okovjemultiautogroup.com/wp-content/uploads/2020/09/RT-5.jpg), where a zinc alloy is applied to the strip for corrosion protection. I would include this and the vehicles in the game, as it reflects the current state of technology in steel production. I am an engineer myself and work in this field.