<SEC-DOCUMENT>0001193125-17-337929-index.html : 20171109
<SEC-HEADER>0001193125-17-337929.hdr.sgml : 20171109
<ACCEPTANCE-DATETIME>20171109060744
ACCESSION NUMBER:		0001193125-17-337929
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20171109
DATE AS OF CHANGE:		20171109

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLEGHENY TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0001018963
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		IRS NUMBER:				251792394
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-204209
		FILM NUMBER:		171188130

	BUSINESS ADDRESS:	
		STREET 1:		1000 SIX PPG PLACE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222
		BUSINESS PHONE:		4123942800

	MAIL ADDRESS:	
		STREET 1:		100 SIX PPG PLACE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGHENY TELEDYNE INC
		DATE OF NAME CHANGE:	19960716
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>d473162d424b5.htm
<DESCRIPTION>FORM 424B5
<TEXT>
Document 1 - file: d473162d424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g473162g36o10.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g473162g36o10.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g473162g88m90.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g473162g88m90.jpg

</DOCUMENT>
</SEC-DOCUMENT>