Obsession Over One Steel Sheet: 70 Years of China’s Grain-Oriented Silicon Steel Entrepreneurship

1974 group photo at WISCO after rolling China’s first imported full-process grain oriented silicon steel coil

Forms the core of high-efficiency power transformers. China spent nearly 70 years overcoming technical blankness, equipment bottlenecks and foreign blockades to master full CRGO production. This timeline tracks three restart cycles, two equipment-driven bottlenecks, a 17-year research deadlock, WISCO’s No.1.7m mill import breakthrough, decades of technology digestion, and 2020s full industrial overtaking, with China now supplying over 70% of global GO steel output including cutting-edge laser-scribed ultra-thin grades.

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