The structure consists of graphite nodules in the matrix of bainitc. So these rolls are stronger and wear assistance with respect of Spheroidal Graphite Iron / S.G.I. Pearlitic Rolls and are capable of much higher hardness because S.G.I. Bainitic Acicular is more alloyed with very higher percentage of Nickel and Molybdenum than the S.G.I. Pearlitic and as a result, the Acicular roll material has a Bainitic matrix with increased carbide. The name of this material is based on its constituents of nodular graphite and carbides in an Acicular Bainitic matrix, also called Lower Bainitic. These Rolls become a benchmark in the rolling of long product and in suitable for a vide range of applications due to its hardness penetration good wear assistance and tough necks.