Scratches On Rolled Steel Products
Scratches are longitudinal or near longitudinal indentations caused by mechanical rubbing of the bar on protrusions as it is processed.–AISI Technical Committee on Rod and Bar Mills, Detection, Classification, and Elimination of Rod and Bar Surface Defects
Scratches are detected visually and are caused by unintentional contact with build up on mechanical parts and mill components during rolling. Scratches typically have a more rounded bottom and less scale than a seam or crack.