Strand
The steel strand exits the mold (upper left) and bends as it moves through the spray chamber. Normally, the strand cannot be seen between the support rolls and fog caused by steam from the water spray nozzles which cool the strand surface.

The interior of the strand is still molten and is contained by the outer shell, which is hot and soft.
The hot strand exits the spray chamber ready to be cut into slabs. Note the colder, darker corners of the slab.