| 1773 | The principality in Darmstadt gives permission to 3 enterprises in the region to found an iron hammer mill in the community of Battenberg in the Eder mountain region. Auhammer is founded. | |
| 1874 | For the first time the name Hasenclever is mentioned in documents. | |
| 1913 | An iron foundry is being built and affiliated to the hammer mill. | |
| 1958 | The hammer mill is shut down and the foundry expands. | |
| 1964 | Takeover by Eisenwerk Brühl first as subsidiary now as an independent affiliated company. | |
| 1973 | Start of crankshaft production in croning procedure. | |
| 1982 | Installation of a moulding line for the production of turbo charger housings and cylinder heads. | |
| 1998 | For the first time production of more than 50 thousand tons. | |
| 2001 | Start of production of turbo charger housings in high temperature resistant cast steel | |
| 2008 | Strategic orientation towards exhaust components for the entire automotive industry | |
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