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

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