"Costs are likely to be up by a mid triple-digit million euro amount compared to last year," Gunnar Groebler told Handelsblatt.
"And we are basically seeing that customers understand that part of the cost increases in the energy sector must also be reflected somewhere in the product prices," he added.
Groebler told Reuters last month that Salzgitter was is in talks with regulators in a bid to secure exemption from potential gas rationing, saying its production was vital for Germany's broader energy security plans and local city heating.
"We are still achieving positive results in our businesses, although certainly not at the same level as in the first half of the year," Groebler said.
(Reporting by Christoph Steitz. Editing by Jane Merriman)