EPA1 Method of rolling deformed bar and roll for
A steel bar for concrete reinforcement having knots and four ribs on its surface is produced by performing the final finish rolling by means of a tworoll rolling mill. Rolls R 1, R 2 of the tworoll rolling mill have a roll caliber (3), round calibers (2) and a bottom groove (1). The roll caliber (3) is substantially semicircular in cross section, and is provided over the whole peripheral