Plate

Flat rolled product of some minimum thickness and width arbitrarily dependent on the type of metal. Thickness of plates typically ranges from 6 to 300 mm (from 0.25 to 12 inches), width from 200 to 2000 mm (8 to 80 inches).
Rolled from heavy slabs supplied by a slabbing mill or continuous caster or sometimes rolled directly from an ingot, plates vary greatly in dimensions. The largest mills can roll plates 200 millimetres thick, 5 metres wide, and 35 metres long. These three dimensions are determined by the slab or ingot weight as well as the rolling-mill size. Sometimes only a few plates of the same dimensions and quality specifications are ordered.