| 1937 | The industrial area in Salzgitter, including the steelworks under the umbrella of „Reichswerke Hermann Göring“, is established. |
| 1939 | First pig iron production |
| 1942 | Within the steelworks, plants for the production of ammunition are built and slave labourers and inmates form the concentration camp in Drütte have to work there. |
| 1949 | Restart of pig iron production after world war; diassambly of plants by the allied forces. |
| 1950 | End of disassambly after demonstrations of the employees. |
| 1951 | The name "Reichswerke AG für Bergbau und Hüttenbetriebe" is modified into "Aktiengesellschaft für Bergbau und Hüttenbetriebe". |
| 1961 | Change of name to Salzgitter Hüttenwerke AG |
| 1970 | Merger of Salzgitter Hüttenwerke and Ilseder Hütte. At the same time the company's name is changed to Stahlwerke Peine-Salzgitter AG. |
| 1992 | Renamed to Preussag Stahl AG |
| 1995 | Opening of the memorial place at the former concentration camp Drütte on the premises of the steelworks. |
| 1998 | While going public (at the stock exchange), the company is renamed to Salzgitter AG |
| 2001 | The group restructures itself. Consolidated beneath a management holding, independent companies are working within a dezentralized organisation. The steelworks at Salzgitter turn into Salzgitter Flachstahl GmbH |