PITTSBURGH--Citing the collapse in global oil prices, U.S. Steel Corp. will idle its plant in Lorain, Ohio, laying off 614 workers, a company spokeswoman said Tuesday.

The plant makes steel pipe and tube for oil-and-gas exploration and drilling. With oil prices currently around $50 a barrel, their lowest level since 2009, energy companies have far less incentive to drill for new supply, reducing demand for the plant’s products.