-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 2QIGevifEvxDImiRklVrBw==

<SEC-DOCUMENT>0001125282-04-005572.txt : 20041108
<SEC-HEADER>0001125282-04-005572.hdr.sgml : 20041108
<ACCEPTANCE-DATETIME>20041108102138
ACCESSION NUMBER:		0001125282-04-005572
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		9
CONFORMED PERIOD OF REPORT:	20040930
FILED AS OF DATE:		20041108
DATE AS OF CHANGE:		20041108

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STEEL DYNAMICS INC
		CENTRAL INDEX KEY:			0001022671
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
		IRS NUMBER:				351929476
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-Q
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		041124416

	BUSINESS ADDRESS:	
		STREET 1:		6714 POINTE INVERNESS WAY
		STREET 2:		SUITE 200
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
		BUSINESS PHONE:		2604593553

	MAIL ADDRESS:	
		STREET 1:		6714 POINTE INVERNESS WAY
		STREET 2:		SUITE 200
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-Q
<SEQUENCE>1
<FILENAME>b402134_10q.htm
<DESCRIPTION>QUARTERLY REPORT
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>emptybox.gif
<DESCRIPTION>GRAPHIC
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tickedbox.gif
<DESCRIPTION>GRAPHIC
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.01
<SEQUENCE>4
<FILENAME>b402134_ex1001.txt
<DESCRIPTION>CREDIT AGREEMENT
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.01.A
<SEQUENCE>5
<FILENAME>b402134_ex1001a.txt
<DESCRIPTION>FIRST AMENDMENT TO CREDIT AGREEMENT
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>6
<FILENAME>b402134_ex31-1.txt
<DESCRIPTION>CEO CERTIFICATION PURSUANT TO SECTION 302
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>7
<FILENAME>b402134_ex31-2.txt
<DESCRIPTION>PRINCIPAL FIN. OFFICER CERT. PURSUANT SECTION 302
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>8
<FILENAME>b402134_ex32-1.txt
<DESCRIPTION>CEO CERTIFICATION PURSUANT TO 18 U.S.C. 1350
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.2
<SEQUENCE>9
<FILENAME>b402134_ex32-2.txt
<DESCRIPTION>PRINCIPAL FIN. OFFICER CERT. 18 U.S.C. 1350
</DOCUMENT>
</SUBMISSION>