SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC  20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported):  August 1, 2007 (July 31, 2007)

STEEL DYNAMICS, INC.
(Exact name of registrant as specified in its charter)

6714 Pointe Inverness Way, Suite 200, Fort Wayne, Indiana 46804
(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code:  260-459-3553

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01.  Other Events

On July 31, 2007, Steel Dynamics, Inc. issued a press release entitled “Steel Dynamics Structural Mill Project to Expand Capacity to 2 Million Tons.”  The full text of the press release is furnished herewith and attached hereto as Exhibit 99.1.

Item 9.01.  Financial Statements and Exhibits

( c )         Exhibits.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned hereto duly authorized.