<SEC-DOCUMENT>0001104659-18-062449-index.html : 20181017
<SEC-HEADER>0001104659-18-062449.hdr.sgml : 20181017
<ACCEPTANCE-DATETIME>20181017111827
ACCESSION NUMBER:		0001104659-18-062449
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20181017
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20181017
DATE AS OF CHANGE:		20181017

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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		181125725

	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>8-K
<SEQUENCE>1
<FILENAME>a18-36842_18k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: a18-36842_18k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-3.2D
<SEQUENCE>2
<FILENAME>a18-36842_1ex3d2d.htm
<DESCRIPTION>EX-3.2D
<TEXT>
Document 2 - file: a18-36842_1ex3d2d.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>a18-36842_1ex99d1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 3 - file: a18-36842_1ex99d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g368421mmi001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g368421mmi001.jpg

</DOCUMENT>
</SEC-DOCUMENT>