Judges heard how the man sold 16 tonnes of high-grade graphite that authorities suspect went to the Iranian weapons programme via Turkey between 2005 and 2007. Turkish border police uncovered another two attempted shipments at the border.
During transport, the graphite in question was camouflaged under a blanket of low-grade graphite in mislabelled containers.
Further, courts ruled the man must give his €705,000 in sales profits to the state. Neither the defence or the federal prosecutors office will appeal the sentence.