EXHIBIT 21

Subsidiaries



|                                            |  |                                                         |  |                              
|------------------------------------------- |  | ------------------------------------------------------- |  | -----------------------------
|Name                                        |  | Ownership                                               |  | Jurisdiction of Incorporation
|                                            |  |                                                        
|Aerofin Corporation                         |  | 100% owned by Ampco-Pittsburgh Securities V Corporation |  | New York                     
|                                            |  |                                                        
|Ampco-Pittsburgh Securities III Corporation |  | 100% owned by Ampco-Pittsburgh
Corporation              |  | Delaware                     
|                                            |  |                                                        
|Ampco-Pittsburgh Securities V Corporation   |  | 100% owned by Ampco-Pittsburgh
Corporation              |  | Delaware                     
|                                            |  |                                                        
|Ampco UES Sub, Inc.                         |  | 100% owned by Union Electric Steel
Corporation          |  | Delaware                     
|                                            |  |                                                        
|Buffalo Air Handling Company                |  | 100% owned by Ampco-Pittsburgh
Corporation              |  | Delaware                     
|                                            |  |                                                        
|Buffalo Pumps, Inc.                         |  | 100% owned by Ampco-Pittsburgh
Corporation              |  | Delaware                     
|                                            |  |                                                        
|Union Electric Steel Corporation            |  | 100% owned by Ampco-Pittsburgh Securities V Corporation |  | Pennsylvania                 
|                                            |  |                                                        
|Union Electric Steel B.V.B.A.               |  | 100% owned by 3048568 Nova Scotia
Company               |  | Belgium                      
|                                            |  |                                                        
|Union Electric Steel (UK) Limited           |  | 100% owned by Ampco UES Sub, Inc.                       |  | England                      
|                                            |  |                                                        
|The Davy Roll Company Limited               |  | 100% owned by Union Electric Steel (UK)
Limited         |  | England                      
|                                            |  |                                                        
|Union Electric Steel (Hong Kong) Limited    |  | 100% owned by Union Electric Steel
Corporation          |  | Hong Kong                    

The financial statements of all subsidiaries have been consolidated with those of the Corporation. Names of other
subsidiaries have been omitted because, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary.



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| |  |  |  | ampco pittsburgh | 2007 annual report