Manufacturing process

Sheet products are first cast by the semicontinuous casting process,then scalped to remove surface roughness and preheated in readiness for hot rolling. They are first reduced to the thickness of plate,and then to sheet if this is required. Hot rolling is followed by cold rolling,which imparts finish and temper in bringing the metal to the gauge required. Material is supplied in the annealed (soft condition) and in at least three degrees of hardness,H1,H2 and H3 (in ascending order of hardness).