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Cross-posted on Physics.SE.

It makes sense that something like grain-oriented electrical steel would have good magnetic properties (e.g., magnetic permeability). I'm envisioning magnetic field lines being guided by regularly arranged atoms.

I understand, however, that amorphous steel can also have good magnetic properties. How is this possible without a crystalline structure in the metal?

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Answer by Ján Lalinský that was accepted by OP on Physics.SE:

"Amorphous means positions of atoms are random. But this still allows for aligned magnetic moments. Then for magnetization it does not matter where the atoms are, only that their moments are aligned."

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