According to Ihor Korytko, head of the steel and rolled steel division at Metinvest, the company intends to invest USD 4 bln to upgrade four blast furnaces at Enakievo Steel (ENMZ: U/R) and Azovstal (AZST: BUY). Metinvest plans to increase steel output 10% yoy to 9.4 mln mt in 2007 and to 12.5 mln mt in 2012.