<SUBMISSION>
<ACCESSION-NUMBER>0001104659-07-066715
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>3
<PERIOD>20070830
<ITEMS>8.01
<ITEMS>9.01
<FILING-DATE>20070904
<DATE-OF-FILING-DATE-CHANGE>20070904
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>STEEL DYNAMICS INC
<CIK>0001022671
<ASSIGNED-SIC>3312
<IRS-NUMBER>351929476
<STATE-OF-INCORPORATION>IN
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>000-21719
<FILM-NUMBER>071095994
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>6714 POINTE INVERNESS WAY
<STREET2>SUITE 200
<CITY>FORT WAYNE
<STATE>IN
<ZIP>46804
<PHONE>2604593553
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>6714 POINTE INVERNESS WAY
<STREET2>SUITE 200
<CITY>FORT WAYNE
<STATE>IN
<ZIP>46804
</MAIL-ADDRESS>
</FILER>
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<TYPE>8-K
<SEQUENCE>1
<FILENAME>a07-23187_18k.htm
<DESCRIPTION>8-K
<TEXT>
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<div style="font-family:Times New Roman;">
 <div style="border:none;border-top:double windowtext 6.0pt;padding:0pt 0pt 0pt 0pt;"> <p style="border:none;margin:0pt 0pt .0001pt;padding:0pt;"><a name="scotch"></a><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p> </div>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE
COMMISSION</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WASHINGTON, DC&#160; 20549</font></b></p>

<div style="line-height:9.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><hr size="1" width="160" noshade color="black" align="center" style="width:120.0pt;"></div>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM 8-K</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT
REPORT</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of 1934</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report
(date of earliest event reported): <b>September 4, 2007 (August
30, 2007)</b></font></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">STEEL DYNAMICS, INC.</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of
registrant as specified in its charter)</font></p>

<div align="center">

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr height="41" style="height:30.75pt;">
  <td width="33%" height="41" valign="top" style="height:30.75pt;padding:0pt .7pt 0pt .7pt;width:33.34%;">
  <p align="center" style="font-size:10.0pt;margin:0pt 0pt .0001pt;text-align:center;"><!-- SET mrlNoTableShading --><b>Indiana</b></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other
  jurisdiction</font></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">of
  incorporation)</font></p>
  </td>
  <td width="33%" height="41" valign="top" style="height:30.75pt;padding:0pt .7pt 0pt .7pt;width:33.34%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">0-21719</font></b></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File
  Number)</font></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="33%" height="41" valign="top" style="height:30.75pt;padding:0pt .7pt 0pt .7pt;width:33.34%;">
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">35-1929476</font></b></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer</font></p>
  <p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Identification
  No.)</font></p>
  </td>
 </tr>
</table>

</div>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">6714 Pointe Inverness Way, Suite
200, Fort Wayne, Indiana 46804</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of
principal executive offices) (Zip Code)</font></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registrant&#146;s
telephone number, including area code:&#160; <b>260-459-3553</b></font></p>

<p align="center" style="margin:0pt 0pt .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Not Applicable</font></b></p>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former name or
former address, if changed since last report)</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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:</font></p>

<p style="font-size:10.0pt;margin:0pt 0pt 12.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>
Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)</p>

<p style="font-size:10.0pt;margin:0pt 0pt 12.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)</p>

<p style="font-size:10.0pt;margin:0pt 0pt 12.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))</p>

<p style="font-size:10.0pt;margin:0pt 0pt 12.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font>
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))</p>

<p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>


 <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0pt 0pt 0pt 0pt;"> <p style="border:none;margin:0pt 0pt .0001pt;padding:0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p> </div>
</div><br><hr size="3" width="100%" noshade color="#010101" align="center">

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<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt 72.0pt;page-break-after:avoid;text-indent:-72.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
8.01.</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Other
Events.</b></p>

<p style="margin:0pt 0pt 12.0pt;page-break-after:avoid;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On August&nbsp;30,
2007, Steel Dynamics, Inc. issued a press release entitled &#147;Steel Dynamics Updates Third Quarter Earnings
Guidance&#148; containing information about the company&#146;s anticipated results
of operations for the three-month period ending September&nbsp;30, 2007, the
expanded stock repurchase program and the regular and special quarterly
dividend.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The full text of the
press release is furnished herewith and attached hereto as Exhibit&nbsp;99.1</font></p>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt 72.0pt;page-break-after:avoid;text-indent:-72.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
9.01.</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Financial
Statements and Exhibits</b></p>

<p style="margin:0pt 0pt 12.0pt;page-break-after:avoid;text-indent:36.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(c)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Exhibits.</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;font-family:Times New Roman;width:100.0%;">
 <tr style="page-break-inside:avoid;">
  <td width="14%" valign="bottom" style="padding:0pt .7pt 0pt 0pt;width:14.38%;">
  <p style="font-size:8.0pt;font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><!-- SET mrlNoTableShading --></p>
  </td>
  <td width="11%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:11.66%;">
  <p align="left" style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:left;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Exhibit&nbsp;Number</font></b></p>
  </td>
  <td width="1%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:1.3%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></b></p>
  </td>
  <td width="72%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt 0pt;width:72.66%;">
  <p style="font-weight:bold;line-height:8.0pt;margin:0pt 0pt .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;">Description</font></b></p>
  </td>
 </tr>
 <tr style="page-break-inside:avoid;">
  <td width="14%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:14.38%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="11%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:11.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
  </td>
  <td width="1%" valign="top" style="padding:0pt .7pt 0pt 0pt;width:1.3%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="72%" valign="top" style="border:none;padding:0pt .7pt 0pt 0pt;width:72.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">A press release dated August 30, 2007 titled &#147;Steel
  Dynamics Updates Third Quarter Earnings Guidance.&#148;</font></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>


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<p align="center" style="margin:0pt 0pt 12.0pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURE</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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.</font></p>

<div align="center" style="font-family:Times New Roman;">

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" colspan="2" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.22%;">
  <p style="font-size:10.0pt;margin:0pt 0pt .0001pt;"><!-- SET mrlNoTableShading -->STEEL DYNAMICS, INC.</p>
  </td>
 </tr>
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" colspan="2" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="48%" colspan="2" valign="top" style="padding:0pt .7pt 0pt .7pt;width:48.22%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:4.76%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="43%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt .7pt;width:43.46%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ Theresa E. Wagler</font></p>
  </td>
 </tr>
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: September 4, 2007</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:4.76%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
  </td>
  <td width="43%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:43.46%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Theresa E. Wagler</font></p>
  </td>
 </tr>
 <tr>
  <td width="34%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:34.12%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="bottom" style="padding:0pt .7pt 0pt .7pt;width:17.66%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:4.76%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>
  </td>
  <td width="43%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:43.46%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Vice President &amp; Chief Financial Officer</font></p>
  </td>
 </tr>
</table>

</div>

<p align="right" style="margin:0pt 0pt 12.0pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>



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<FILENAME>a07-23187_1ex99d1.htm
<DESCRIPTION>EX-99.1
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<p align="right" style="margin:0pt 0pt 12.0pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit 99.1</font></b></p>

<p align="right" style="margin:0pt 0pt 12.0pt;page-break-after:avoid;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="center" style="font-family:Times New Roman;">

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr height="48" style="height:36.0pt;">
  <td width="44%" height="48" valign="top" style="height:36.0pt;padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="font-size:10.0pt;margin:0pt 0pt .0001pt;"><!-- SET mrlNoTableShading --><b><font size="5" style="font-size:18.0pt;font-weight:bold;">Press Release<br>
  </font>August 30, 2007</b></p>
  </td>
  <td width="55%" height="48" valign="top" style="height:36.0pt;padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman"><img width="137" height="32" src="g231871kai001.jpg"></font></p>
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">6714 Pointe Inverness
  Way, Suite 200</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="55%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fort Wayne, IN
  46804-7932</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="55%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">260.459.3553 Phone</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="55%" valign="top" style="padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">260.969.3590 Fax</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="margin:0pt 0pt .0001pt;"><i><font size="2" face="Times New Roman" style="font-size:1.0pt;font-style:italic;">&nbsp;</font></i></p>
  </td>
  <td width="55%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">www.steeldynamics.com</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="border:none;padding:0pt .7pt 0pt .7pt;width:44.68%;">
  <p style="margin:0pt 0pt .0001pt;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">&nbsp;</font></i></p>
  </td>
  <td width="55%" valign="top" style="border:none;padding:0pt .7pt 0pt .7pt;width:55.32%;">
  <p align="right" style="margin:0pt 0pt .0001pt;text-align:right;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">&nbsp;</font></i></p>
  </td>
 </tr>
</table>

</div>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Steel
Dynamics Updates Third Quarter Earnings Guidance</font></b></p>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">FORT WAYNE, INDIANA</font></i>,
August&nbsp;30, 2007&#151;Steel Dynamics, Inc. (NASDAQ/GS: STLD) today announced
that it is adjusting its earnings guidance for the third quarter of 2007 based
on better information that is now available regarding required purchase
accounting adjustments related to the July&nbsp;2, 2007 acquisition of The
Techs.</p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;At the time of our July
guidance, we suggested that we would update our estimates, by the end of
August, if necessary, for certain purchase accounting charges related to The
Techs acquisition,&#148; said Keith Busse, Chairman and CEO. &#147;The company is still
in the process of determining final purchase price allocations for The Techs
acquisition and the resulting impact on our third quarter
earnings.&nbsp;However, based on current estimates we believe third quarter
earnings could be in an updated range of $1.02 to $1.07 per diluted share.&#148;</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Regular and Special Dividends
Declared</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
company&#146;s Board of Directors has approved the regular quarterly dividend of
$0.10 per share as well as a continued special quarterly dividend of $0.05 per
share to be distributed to shareholders of record at the close of business on
September 29, 2007. Shareholders will receive a combined cash dividend of $0.15
per common share payable on October 12, 2007. The board also has approved the
payment of the regular and special dividends at the same rates for the fourth
quarter of 2007, payable in January, 2008.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Stock Repurchase Program Expanded</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
Board of Directors also approved an increase of 5 million shares to the
existing share repurchase program.&#160; As of
August 24, 2007, approximately 6.7 million shares remained available for
repurchase after including the additional authorized shares. From July 1
through August 24, the company repurchased approximately 3.2 million shares at
a cost of approximately $125 million. Purchases of the shares of the company&#146;s
common stock are made based upon the market price, the nature of other
investment opportunities and growth projects, expected cash flows from
operations, and other general and industry-specific economic conditions.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Business
Outlook</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Commenting on current
steel industry conditions, Busse said, &#147;In our July 23, 2007, news release and
during the subsequent conference call, we discussed steel market conditions and
offered our views on the third quarter. We have no significant changes in our
assessment to report at this time. Flat-rolled steel market conditions are
improving, resulting in steady order activity and moderately increasing selling
values. Structural and bar steels continue to experience solid bookings and
pricing strength. Order rates for fabricated building products remain strong.
Lower steel scrap costs for the third quarter, as we mentioned previously, will
have a positive impact on the quarter&#146;s results due to our favorable scrap
inventory position, and we expect the moderate increases in scrap pricing seen
recently not to seriously impact our profit margins in the near term,&#148; Busse
said.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Taking
a longer view, we remain optimistic that 2007 will be another record-setting year
for Steel Dynamics in steel shipments, revenues, and earnings. We continue to
benefit from our diversified product mix, new product offerings, added
production capacity, low cost-structure, effective scrap procurement programs,
and continued commercial acceptance of our steel products,&#148; Busse said. &#147;With
the addition of The Techs for the second half of the year, we will
significantly increase our market share in value-added hot-dipped galvanized
steel products. We </font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>


<br><hr size="3" width="100%" noshade color="#010101" align="center">

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<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">continue
to make investments to support our future growth, with a recently announced
caster project at the structural mill expected to bring our annual steel
production capacity to 6.7 million tons by 2009, plus the capability of The
Techs facilities to process an additional 1 million tons of flat-roll steel.</font></p>

<div style="line-height:9.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><hr size="1" width="100%" noshade color="black" align="center"></div>

<p style="margin:0pt 0pt 3.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0pt 0pt 12.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Forward-Looking
Statements</font></b></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This press release
contains some predictive statements about future events and conditions,
including statements related to conditions in the steel marketplace, Steel
Dynamics&#146; shipments, revenues and earnings projections, costs of raw materials,
future profitability and earnings, start-up of expanded or new facilities,
growth of production capacity, and the accounting categorization of assets and
expenses related to acquisitions. These statements are intended to be made as &#147;forward-looking,&#148;
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.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Factors that could cause
such predictive statements to turn out other than as anticipated or predicted
include, among others:&#160; 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.</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In addition, we refer you
to SDI&#146;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 Steel Dynamics Web site,
www.steeldynamics.com</font></p>

<p style="margin:0pt 0pt 12.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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.&#160; 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.&#160; We undertake no duty to update
or revise any forward-looking statement, whether as a result of new
information, future events or otherwise.</font></p>

<div style="line-height:9.0pt;margin:0pt 0pt .0001pt;page-break-after:avoid;text-align:center;"><hr size="1" width="100%" noshade color="black" align="center"></div>

<p style="margin:0pt 0pt .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="font-family:Times New Roman;font-size:10.0pt;margin:0pt 0pt 12.0pt 55.0pt;text-indent:-55.0pt;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">Contact:</font></i><i><font size="1" style="font-size:3.0pt;font-style:italic;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Fred
Warner, Investor Relations Manager, (260) 969-3564 or fax (260) 969-3590<br>
<b>f.warner@steeldynamics.com</b></i></p>

<p align="right" style="margin:0pt 0pt 12.0pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>



</div><br><hr size="3" width="100%" noshade color="#010101" align="center">

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