Cold-rolled sheets

The technical and economic advantages of continuous steel casting over conventional ingot casting led, of necessity, to the disappearance of effervescent steels and the widespread use of aluminum-quenched steels.

In the recent past, ordinary steels were annealed exclusively by stacking coils, placing them under a bell and heating them in a protective atmosphere: this is base annealing.

On the other hand, tinplate, stainless steels and steels with magnetic properties have long been annealed by heating a strip on the fly through a furnace: this is continuous annealing. This technique, which has been extended to all steels over the last twenty years or so, has the added advantage...