<SEC-DOCUMENT>0001193125-21-270170-index.html : 20210910
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<ACCEPTANCE-DATETIME>20210910172423
ACCESSION NUMBER:		0001193125-21-270170
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		10
FILED AS OF DATE:		20210910
DATE AS OF CHANGE:		20210910

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:	333-254906
		FILM NUMBER:		211247908

	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
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Document 4 - file: g196748g09m01.jpg

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Document 7 - file: g196748g15y09.jpg

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Document 8 - file: g196748g18n73.jpg

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Document 9 - file: g196748g80i44.jpg

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