|Founded||1891, Hamborn, Prussian Rhine Province, Germany|
|Products||Iron, steel, stainless products, shipbuilding, elevators|
On 29 September 1891, August Thyssen and his brother Joseph Thyssen came to be in possession of all shares of Gewerkschaft Deutscher Kaiser, a coal mining company. On 17 December 1891, the steelworks of the same company opened in Hamborn (today part of Duisburg).
Subsequently, the plant was modernized and expanded by August Thyssen, becoming a vertically integrated company producing iron and steel and manufacturing ships, machines etc.
On 4 April 1926, August Thyssen died; his son, Fritz Thyssen became chairman of a new group Vereinigte Stahlwerke AG (United Steelworks) which was formed by a consortium of companies, with Thyssen representing 26% of the company's value. In 1934, August Thyssen-Hütte AG was founded as part of the new group.
The Nazi rearmament policy and subsequent war made the plants essential to the war economy. After the end of World War II, the Allies ordered the company to be liquidated and in 1953 a new company, also named August Thyssen-Hütte AG, was formed in Duisburg. The other mills of the company in Duisburg became legally independent entities; in the 1950s and 1960s they were reintegrated into the Thyssen group. However, the mining division was not reconglomerated; thus Thyssen became largely a steel company.
Further companies were acquired: Niederrheinischen Hütte AG in 1956, Deutschen Edelstahlwerke AG in 1957, Phoenix-Rheinrohr AG (metallurgical works and mills), and Hüttenwerk Oberhausen AG in 1968. The product range included steel sections and flat steel in all grades, including high-alloy steel. By the mid 1960s, August Thyssen-Hütte AG was Europe's largest crude steel producer, and the fifth largest in the world.
In 1973, the company acquired Rheinstahl AG, which was mainly a manufacturing company. This takeover reduced the company's dominance in the steel industry and converted it to a conglomerate. In 1977, the company became Thyssen AG, with Rheinstahl AG already having been renamed Thyssen Industrie AG in 1976.
In 1983, Thyssen Stahl AG was spun off. During the 1980s, talks on a merger between Thyssen Stahl AG and Krupp Stahl AG took place. An alliance did not take place at that time, but there began cooperation on certain business areas (tinplate, electrical steel, and stainless steel).
In 1997, the flat steel production divisions of both groups were merged to form Thyssen Krupp Stahl AG.
On 17 March 1999, a new group formed by the merger of Thyssen and Krupp was registered, and on 23 October the merger took place, forming Thyssen-Krupp AG. That same year, they acquired the elevator division of American-based conglomerate Dover Corporation.
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