Good properties for magnetostriction are obtained in steel with a Si-content of 6.5%, but this makes the material extremely brittle and the rolling procedure very difficult. An experimental program was carried out to evaluate the possibility to produce high-silicon steel up to 6.5%Si in final thickness aimed at 0.50-0.35mm through an adequate rolling scheme, including hot, warm and cold rolling. Fe-Si-alloys with Si-contents up to 6.5% have been studied. Different melts were prepared in one of the participating laboratories and first hot rolled to a thickness of 25mm. In these materials, some cracks, inclusions and precipitates (mainly carbides and some TiN) were already observed after this first rolling procedure and quantified. Nevertheless, their interference with the further rolling process was less harmful than would be expected. To continue hot rolling the slabs were reheated and hot rolled to a final thickness between 2.90 and 1mm. Tensile tests carried out on tested materials after hot rolling showed that all samples are very brittle and the elongation in a tensile test is less than 1% Samples with lower Si-contents have lower strength than those with higher Si-contents, but they are more ductile. The cold rolling was done obtaining 0.50mm. final thickness in the samples with lower Si-content and 0.55mm in the high-Si samples. The cold rolling behaviour will be described. Finally the magnetic proper-ties of some of the strips with a thickness of 0.65mm were studied in detail and compared with published results on FeSi-6.5 samples.