ISO 6935-2:2007 specifies technical requirements for ribbed bars to be used as reinforcement in concrete. ISO 6935-2:2007 covers ten steel grades not intended for welding which are B300A-R, B300B-R, B300C-R, B300D-R, B400A-R, B400B-R, B400C-R, B500A-R, B500B-R and B500C-R, and eleven steel grades intended for welding which are B300DWR, B350DWR, B400AWR, B400BWR, B400CWR, B400DWR, B420DWR, B500AWR, B500BWR, B500CWR and B500DWR. The steel grades are designated with steel names allocated in accordance with ISO/TS 4949:2003. ISO 6935-2:2007 covers products delivered in straight lengths. The production process is at the discretion of the manufacturer. Ribbed bars produced from finished products, such as plates and railway rails, are excluded.