Super Core is manufactured using an innovative process that is completely different from that for conventional silicon steel sheets. These are the highest grade, non-oriented magnetic steel sheets available.
Conventional silicon steel sheets have a Si (silicon) content of 3.5% or less. It has long been known that the magnetic characteristics of a silicon steel sheet improve as the Si content increases, peaking at 6.5%.
However, it has been impractical to produce thin steel sheets with a Si content of over 3.5% because the steel tends to harden and become brittle. In 1993 JFE Steel solved this production problem through the adoption of a process called the CVD process, and successfully introduced the first 6.5% Si steel sheets (JNEX-Core) to the world. In order to meet new demands, this technology has continued to be developed, leading to the commercial production of gradient high-silicon steel sheets with superior high-fr
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