Raw steel production in the country's Great Lakes region slipped to about 654,000 tons in the week that ended Saturday, according to an American Iron and Steel Institute estimate.
Production fell by about 3,000 tons, or about 0.4 percent from the week prior. Most of the raw steel production in the Great Lakes region takes place in Indiana and the Chicago area.
Production in the Southern District was estimated at 685,000 tons last week, up from 669,000 tons a week earlier.
Total domestic raw steel production last week was about 1.88 million tons, up from 1.84 million a week prior. Steelmakers made about 7.2 percent more steel last week than they did over the same period last year.
U.S. steel mills had a capacity utilization rate of 78.3 percent last week, which is up from 76.9 percent a week earlier. The capacity utilization rate had been 70.4 percent at the same time last year.
So far this year, domestic steel producers have had a capacity utilization rate of 77.2 percent, which is up from 77 percent during the same period in 2012.
Domestic mills have produced an estimated 70.3 million tons of steel this year, down 3.6 percent from the same period last year. The mills had made about 72.9 million tons of steel by Sept. 21, 2012.
July steel shipment were up 6 percent from June, but down 4.1 percent from the prior year, according to an American Iron and Steel Institute estimate.
U.S. steel mills shipped 8.2 million net tons in July. Shipments year-to-date reached 55.6 million net tons in July, a 4.1 percent decrease versus the same period in 2012.