Grain oriented electrical steel is an essential material in the manufacture of energy-efficient transformers and large, high-performance generators.  Its unrivalled magnetic properties are a result of its unique grain structure, which is formed through a complex production process starting from high-silicon hot-rolled coil feedstock.

During the secondary re-crystalisation process some grains grow to over 30mm in length, whereas mild steels require a microscope to view the grain structure.  The orientation of the enhanced grain structure provides significantly better magnetic properties in the rolling direction of the sheet.