Patent ID: 7975754

Claim:
A method of casting thin steel strip comprising: a. assembling a pair of internally cooled casting rolls having a nip therebetween and with confining closures adjacent the ends of the nip; b. introducing molten carbon steel having a carbon content of between about 0.010% and about 0.065% by weight, less than 5.0% by weight chromium, at least 70 ppm of total oxygen and between 20 and 70 ppm of free oxygen, and an average manganese to sulfur ratio at least 250 between the pair of casting rolls to form a casting pool supported on the casting surfaces of the casting rolls; c. counter rotating the casting rolls to form solidified metal shells on the casting surfaces of the casting rolls; and d. forming from said solidified shells thin steel strip downwardly through the nip between the casting rolls.