Patent ID: 6852180

Claim:
A process for manufacturing a carbon steel strip suitable for use as packaging steel, in which: a steel having a composition suitable for use as packaging steel, wherein said steel contains alloying elements of Si, Cr, Ni, Mo, and Cu present in an amount less than 1%, is cast in the form of a thin strip from 0.7 to 10 mm in thickness, directly from liquid metal; an in-line hot rolling operation is carried out on said strip, wherein the strip after hot rolling has a thickness of less than 3 mm, and wherein at the end of which said steel is in the austenitic range; said strip undergoes forced cooling at a rate of 80 to 400° C./s, at both the beginning and the end of which said steel is in the ferritic range; said strip undergoes a cold rolling operation with a reduction ratio of at least 85%; and said strip undergoes an annealing operation.