Abstract: A process for manufacturing a thin sheet of a Cr-Ni-base stainless steel having an excellent surface quality and material quality, which comprises casting a cast strip having a thickness of 6 mm or less from a Cr-Ni-base stainless steel including 18% Cr-8% Ni steel by a continuous casting wherein a casting mold is moved synchronously with the cast strip, and subjecting the cast strip to cold rolling to form a thin sheet product, wherein the cast strip immediately after the casting is coiled at a temperature of 800.degree. to 1200.degree. C. and subjected to cold rolling and final annealing to form a thin sheet product.

Abstract: A method of rapidly and uniformly widthwise cooling a cast stainless steel strip when casting the strip by using a vertical type twin-roll continuous caster provided with a pair of cooling rolls having an outer circumferential surface composing a casting mold wall moving synchronously with the cast strip, which comprises the step of: pressing a cast strip having left a kissing point between the cooling rolls against the circumferential surface of one of the cooling rolls with a press roll disposed downstream of the kissing point and having a press roll surface geometry predetermined in accordance with a cooling roll crown and a cast strip crown, to rapidly cool the cast strip over the entire strip width, successively from the strip solidification completion and over a temperature range in which the growth of solidified grains of the strip is accelerated.

Abstract: A process in which a cast strip of Cr-Ni type stainless steel having a thickness close to a product thickness is prepared by the synchronous continuous casting. By subjecting the cast strip just below the casting machine to rapid cooling in the high-temperature region, hot-working or cold-working the cast strip and subjecting the cast strip to annealing or the like, .gamma. grains in the cast strip are made finer, and by carrying out cooling in the low-temperature region of temperatures lower than 900.degree. C., precipitation of Cr carbide in the grain boundary is prevented. Thus, occurrence of roping or uneven gloss on the surface of the stainless steel sheet is controlled.