Norwegian steel producers are reeling after the European Union (EU) made a surprise announcement. In a letter sent to countries within the European Economic Area (EEA), the EU revealed that it will introduce new tariffs targeting imports of ferroalloys—an essential material used in steel production.

The European Union and United States will develop a metals alliance to mitigate the impact of subsidised Chinese production on global markets as part of their trade deal, European Trade Commissioner Maros Sefcovic said on Monday.

Trump had most recently threatened tariffs of 30% on imports from the European Union. But on Sunday, he met with the president of the European Commission, and they agreed to a lower level.

The preliminary deal imposes 15 percent tariffs on most E.U. goods, averts a trade war and leaves many details unresolved, including on wine and spirits. Here are industries on the line.