SDI Increases Quarterly Cash Dividend and Continues Special Cash Dividend
FORT WAYNE, INDIANA, September 18, 2006 — Steel Dynamics, Inc. NASDAQ:STLD) ) today announced its Board of Directors approved a regular quarterly cash dividend of $.20 per common share, an increase of 100%, and the continuance of a special cash dividend of $0.10 per common share. Shareholders of record at the close of business on September 29, 2006 will receive a combined cash dividend of $0.30 per common share payable on October 10, 2006.

“This increase in our quarterly cash dividend further emphasizes our optimistic outlook concerning Steel Dynamics current and future financial strength,” stated Keith E. Busse, President and Chief Executive Officer. “We are pleased to be able to reward our loyal shareholders with an increased dividend and look forward to driving continued growth from our existing operations as well as through new opportunities.”

The board intends to continue to declare the special dividend of $0.10 per common share on a quarterly basis for the remainder of 2006.


Contact:
Fred Warner, Investor Relations Manager
(260) 969-3564 or fax (260) 969-3590
f.warner@steeldynamics.com


Forward Looking Statements

This press release contains some predictive statements about future events, including statements related to conditions in the steel marketplace, Steel Dynamics’ revenue growth, future profitability and earnings, future dividend payments, and the operation of new or existing facilities. These statements are intended to be made as “forward-looking,” subject to many risks and uncertainties, within the safe harbor protections of the Private Securities Litigation Reform Act of 1995. Such predictive statements are not guarantees of future performance, and actual results could differ materially from our current expectations.

Factors that could cause such predictive statements to turn out other than as anticipated or predicted include, among others: changes in economic conditions affecting steel consumption; increased foreign imports; increased price competition; difficulties in integrating acquired businesses; risks and uncertainties involving new products or new technologies; changes in the availability or cost of steel scrap or substitute materials; increases in energy costs; occurrence of unanticipated equipment failures and plant outages; labor unrest; and the effect of the elements on production or consumption.

In addition, we refer you to SDI’s detailed explanation of these and other factors and risks that may cause such predictive statements to turn out differently, as set forth in our most recent Annual Report on Form 10-K and in other reports which we from time to time file with the Securities and Exchange Commission, available publicly on the SEC Web site, www.sec.gov, and on the Company’s Web site, www.steeldynamics.com

Forward-looking or predictive statements we make are based on our knowledge of our businesses and the environment in which they operate as of the date on which the statements were made. Due to these risks and uncertainties, as well as matters beyond our control which can affect forward-looking statements, you are cautioned not to place undue reliance on these predictive statements, which speak only as of the date of this press release. We undertake no duty to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

9/18/2006