Brazil's Cia Siderúrgica Nacional expects steel prices to remain stable in the third quarter and iron ore prices to stay around $100 a tonne until the end of the year, directors with the steelmaker and iron miner said on Monday in a phone conference with analysts.

CSN is earning 11 percent to 16 percent more by selling steel in Brazil than exporting it, they said, adding they don't expect the premium to go any higher.