Advantages of the mill edges

• the mill edge is rounded (slit strip = sharp edged)
  
• the mill edge comes without burr and micro cracks (cannot be avoided by slit strip)
  
• the mill edge has a sorbitic edge microstructure in the area of the highest demand

• even high carbon grades can be rolled down without edge cracking (no loss of material and production time)
  
• fewer annealing processes are necessary which means lesser costs. Also extra heat treatment leads to a worse hardening microstructure (coarse grain caused by a longer holding time and higher temperatures) during subsequent hardening processes.
• extended lifetime of the rolls because of natural shaped edges (instead of sharp edged work hardened material)