Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

The following lists the subsidiaries of Allegheny Technologies Incorporated, excluding those subsidiaries which, considered in the aggregate as a single subsidiary, do not constitute a significant subsidiary.

Name of Subsidiary						State or Country of Incorporation
ALC Funding Corporation						Delaware
Allegheny Ludlum, LLC						Pennsylvania
ATI Flat Rolled Products Holdings LLC						Pennsylvania
ATI Ladish LLC						Wisconsin
ATI Operating Holdings, LLC						Delaware
ATI Properties, Inc.						Delaware
Shanghai STAL Precision Stainless Steel Company Limited (1)						China
TDY Holdings, LLC						Delaware
TDY Industries, LLC						California
TDY Holdings Limited						United Kingdom

(1) Owned 60% by the registrant and 40% by China Baowu Steel Group Corporation Limited.