Piercing Rolls

Piercing Rolls.

For rotary piercing a number of roll materials are used. Depending on plant design, operating conditions and mechanical load, low alloyed to medium alloyed tool steels are used, offering good grip and if necessary, a good pressure resistance. The special tool steel Märker® S455 has been specially developed for this application and offers a good compromise of grip, pressure resistance and wear resistance. For the piercing rolls in Diescher mills the tool steel Märker SRSE, with a higher tensile strength, has proved successful.