Dillinger Hütte is a steel producer in Dillingen, in the German Federal State of Saarland, and has a history stretching back more than three hundred years.

A further machine, permitting casting of slabs of up to 400 mm in thickness – the thickest produced anywhere in the world at that time[citation needed] – was added, along with other new facilities, in 1998.

ROGESA itself also has a stake in the ZKS Zentralkokerei Saar coking-plant operator, the facilities of which also form part of the Dillinger Hütte site.

Dillinger Hütte produces heavy steel plate, cast slag pots and semi-finished products, such as pressings, and (pressure) vessel heads and shell sections.

The main application for Dillinger Hütte's heavy plate output, however, is the making of large-caliber line pipe for major pipeline projects.

Dillinger Hütte is also a 50% owner of Europipe GmbH, Europe's largest manufacturer of large-caliber line pipe, with facilities in Germany, France and the USA.

Further examples of the use of steel from Dillinger Hütte: In 1685, Louis XIV of France - the famous "Sun King" - granted approval to the Marquis Charles Henri de Lénoncourt for the construction of an ironworks, complete with a smelting furnace, before the gates of the fortress of Saarlouis.

Locational factors for the founding of this works were excellent - the nearby Prims river supplied the necessary water-power, the surrounding woods the fuel for the furnaces, and the ore deposits in the immediate vicinity the feed materials for production.