-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 l6t38tZlVLGhs2WQBNKbZg==

<SEC-DOCUMENT>0001125282-03-004674.txt : 20030808
<SEC-HEADER>0001125282-03-004674.hdr.sgml : 20030808
<ACCEPTANCE-DATETIME>20030808105500
ACCESSION NUMBER:		0001125282-03-004674
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		7
CONFORMED PERIOD OF REPORT:	20030630
FILED AS OF DATE:		20030808

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:		03830454

	BUSINESS ADDRESS:	
		STREET 1:		7030 POINTE INVERNESS WAY
		STREET 2:		SUITE 310
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
		BUSINESS PHONE:		2194593553

	MAIL ADDRESS:	
		STREET 1:		7030 POINTE INVERNERSS WAY
		STREET 2:		SUITE 310
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-Q
<SEQUENCE>1
<FILENAME>b326325_10q.htm
<DESCRIPTION>QUARTERLY REPORT
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>emptybox.gif
<DESCRIPTION>GRAPHIC
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>tickedbox.gif
<DESCRIPTION>GRAPHIC
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>5
<FILENAME>b326325_ex31-1.htm
<DESCRIPTION>CERT. OF CEO PURSUANT TO THE SARBANES-OXLEY ACT
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>6
<FILENAME>b326325_ex31-2.htm
<DESCRIPTION>CERT. OF PFO PURSUANT TO THE SARBANES-OXLEY ACT
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32
<SEQUENCE>7
<FILENAME>b326325_ex32-1.htm
<DESCRIPTION>CERTIFICATION OF CEO PURSUANT TO SECTION 906
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.2
<SEQUENCE>8
<FILENAME>b326325_ex32-2.htm
<DESCRIPTION>CERTIFICATION OF PFO PURSUANT SECTION 906
</DOCUMENT>
</SUBMISSION>