<SEC-DOCUMENT>0001104659-15-044526-index.html : 20150610
<SEC-HEADER>0001104659-15-044526.hdr.sgml : 20150610
<ACCEPTANCE-DATETIME>20150610135602
ACCESSION NUMBER:		0001104659-15-044526
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		5
CONFORMED PERIOD OF REPORT:	20141231
FILED AS OF DATE:		20150610
DATE AS OF CHANGE:		20150610

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-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		15923169

	BUSINESS ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
		BUSINESS PHONE:		260 459 3553

	MAIL ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>a15-13817_110ka.htm
<DESCRIPTION>10-K/A
<TEXT>
Document 1 - file: a15-13817_110ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>2
<FILENAME>a15-13817_1ex31d1.htm
<DESCRIPTION>EX-31.1
<TEXT>
Document 2 - file: a15-13817_1ex31d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>3
<FILENAME>a15-13817_1ex31d2.htm
<DESCRIPTION>EX-31.2
<TEXT>
Document 3 - file: a15-13817_1ex31d2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>4
<FILENAME>a15-13817_1ex32d1.htm
<DESCRIPTION>EX-32.1
<TEXT>
Document 4 - file: a15-13817_1ex32d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.2
<SEQUENCE>5
<FILENAME>a15-13817_1ex32d2.htm
<DESCRIPTION>EX-32.2
<TEXT>
Document 5 - file: a15-13817_1ex32d2.htm

</DOCUMENT>
</SEC-DOCUMENT>