Shortening of Billets End Cuts
During rolling of long products in continuous or semi-continuous mills, end splitting (alligatoring, split ends) and central bursting may occur, with an impact on productivity and quality. This phenomenon may occur in the roughing passes of the roughing mil, particularly in open mills. Steel grades affected include free cutting steel, rebar, wire rod and shapes. This problem is also known in flat rolling of steel and aluminum. At times, central bursting may occur simultaneously with end splitting or separately. Cobbles may arise as a consequence of the splitting.