The Northern Steel Valley (Ohio-Pennsylvania), the area around Youngstown, Ohio stretching from metro Pittsburgh to metro Cleveland.
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Stocksbridge, the valley that Stocksbridge is situated in is known as "The Steel Valley" due to its long history of Steel Production
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There are also non-capital metropolitan areas in the states of São Paulo (Campinas, Santos and the Paraíba Valley), Minas Gerais (Steel Valley), Rio Grande do Sul (Sinos Valley) and Santa Catarina (Itajaí Valley).