What is Magnitogorsk region?
The city of Magnitogorsk is part of the Chelyabinsk region and is located on its western border, near Bashkiria. It is located on the territory of the Agapovsky district, but is not part of it, being a city of regional subordination.
I know that Magnitogorsk is in the Moscow region and in Chelyabinsk there is also such a city. It depends on what region you need.
Magnitogorsk of the Chelyabinsk region is considered the city of metallurgists about Moscow, alas, I do not know anything.