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  • GO steels

ArcelorMittal Frýdek-Místek leads the world in production of GO steels

Grain oriented electrical steels (GO) are used in the cores of transformers which reduce or increase the voltage of an alternating current. Their superior magnetic properties and insulating coating significantly reduce electric power losses from the transformer.


Left: New furnaces have been installed at ArcelorMittal Frýdek-Místek for high temperature annealing of electrical steels - Right: The new thermo-flattening line at ArcelorMittal Frýdek-Místek is used for continuous annealing and coating processes.


The process of manufacturing GO steels is very demanding. It requires researchers, engineers and operators who have a high level of knowledge, experience and skills. Worldwide, very few companies are capable of manufacturing GO to the high standards required, but ArcelorMittal Frýdek-Místek has been doing it since the early 1960s.

The mill has been selected to produce ArcelorMittal’s improved GO electrical steels. ArcelorMittal Frýdek-Místek is equipped with a state-of-the-art decarburising annealing line and a new thermo-flattening line equipped with a unique inspection system. The modern annealing line ensures the GO steel has a low final carbon content which prevents the steel from ageing. Brand new, energy-efficient furnaces have recently been installed at Frýdek-Místek to improve performance.


The Shape Scan system installed at ArcelorMittal Frýdek-Místek measures strip flatness using lasers.
© Image: Martin Plaček, Argutec s.r.o.

Related information

ArcelorMittal Frýdek-Místek
Find out more about GO steels via the product document centre