Raw steel production in the country's Great Lakes region was 703,000 tons in the week that ended Saturday, according to estimates from the American Iron and Steel Institute.
Production was up 25,000 tons from the week prior. Raw steel from Indiana and the Chicago area represents the majority of production in the Great Lakes region.
Production in the Southern District was estimated at 605,000 tons during the period that ended Saturday, down from about 646,000 tons a week earlier.
Domestic mills produced more than 1.8 million tons of steel last week, up 0.7 percent from the same period in 2011.
U.S. steel mills operated 74.7 percent of the available production capacity last week, which is up from a 74.3 percent production rate a week earlier.
An estimated 57.6 million tons of steel has been produced so far in 2012 at domestic steel mills, compared to about 54.4 million tons made at the same time last year.
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