<SEC-DOCUMENT>0001018963-18-000020-index.html : 20180608
<SEC-HEADER>0001018963-18-000020.hdr.sgml : 20180608
<ACCEPTANCE-DATETIME>20180608132901
ACCESSION NUMBER:		0001018963-18-000020
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180608
DATE AS OF CHANGE:		20180608

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:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12001
		FILM NUMBER:		18888784

	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>11-K
<SEQUENCE>1
<FILENAME>fy201711-kati401ksavingsplan.htm
<DESCRIPTION>11-K
<TEXT>
Document 1 - file: fy201711-kati401ksavingsplan.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>fy201711-kati401ksavplnex231.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 2 - file: fy201711-kati401ksavplnex231.htm

</DOCUMENT>
</SEC-DOCUMENT>