EXHIBIT 21.1



Subsidiaries of Aleris International, Inc. as of March 15, 2006



Wholly owned unless otherwise indicated.



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|1.  |  | Alchem Aluminum, Inc., a Delaware corporation                                                                                                                              
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|2.  |  | Alchem Aluminum Shelbyville Inc., a Delaware corporation                                                                                                                   
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|3.  |  | Aleris Asia Pacific Ltd., a Hong Kong corporation                                                                                                                          
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|4.  |  | Aleris Blanking and Rim Products, Inc. (formerly Indiana Aluminum Inc.), an Indiana corporation                                                                            
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|5.  |  | Aleris do Brasil Holding Ltda. (formerly IMCO Brazil Holding Ltda.), a Brazilian limited liability company                                                                 
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|6.  |  | Aleris Mexico, S. de R.L. de C.V. (formerly IMCO Reciclaje de Mexico, S. de R.L. de C.V.), a Mexican limited liability
company                                             
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|7.  |  | Aleris Nuevo Leon, S. de R.L. de C.V. (formerly IMCO Reciclaje de Nuevo Leon, S. de R.L. de C.V.), a Mexican limited liability
company                                     
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|8.  |  | Aleris Ohio Management, Inc., a Delaware corporation                                                                                                                       
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|9.  |  | Aleris Reciclagem Ltda. (formerly IMCO Reciclagem de Materiais Indústria e Comércio Ltda.), a Brazilian limited liability
company                                          
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|10. |  | Aleris Reciclaje Servicios Administrativos, S. de R.L. de C.V. (formerly IMCO Reciclaje Servicios Administrativos, S. de R.L. de C.V.), a
Mexican limited liability company
|    | 
|11. |  | Aleris Reciclaje Servicios de Manufactura, S. de R.L. de C.V. (formerly IMCO Reciclaje Servicios de Manufactura, S. de R.L. de C.V.), a
Mexican limited liability company  
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|12. |  | ALSCO Holdings, Inc., a Delaware corporation                                                                                                                               
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|13. |  | ALSCO Metals Corporation, a Delaware corporation                                                                                                                           
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|14. |  | Alumitech, Inc., a Delaware corporation                                                                                                                                    
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|15. |  | Alumitech of Cleveland, Inc., a Delaware corporation                                                                                                                       
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|16. |  | Alumitech of Wabash, Inc., an Indiana corporation                                                                                                                          
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|17. |  | Alumitech of West Virginia, Inc., a Delaware corporation                                                                                                                   
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|18. |  | AWT Properties, Inc., an Ohio corporation                                                                                                                                  
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|19. |  | ETS Schaefer Corporation, an Ohio corporation                                                                                                                              
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|20. |  | IMCO Indiana Partnership L.P., an Indiana limited partnership                                                                                                              
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|21. |  | IMCO International, Inc., a Delaware corporation                                                                                                                           
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|22. |  | IMCO Investment Company, a Delaware corporation                                                                                                                            
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|23. |  | IMCO Management Partnership L.P., a Texas limited partnership                                                                                                              
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|24. |  | IIMCO Recycling of California, Inc., a Delaware corporation                                                                                                                
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|25. |  | IMCO Recycling Holding B.V., a Netherlands limited liability company                                                                                                       
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|26. |  | IMCO Recycling of Idaho Inc., a Delaware corporation                                                                                                                       
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|27. |  | IMCO Recycling of Illinois Inc., an Illinois corporation                                                                                                                   
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|28. |  | IMCO Recycling of Indiana Inc., a Delaware corporation                                                                                                                     
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|29. |  | IMCO Recycling of Michigan L.L.C., a Delaware limited liability company                                                                                                    



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|30. |  | IMCO Recycling (Netherlands) B. V., a Netherlands limited liability company                          
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|31. |  | IMCO Recycling of Ohio Inc., a Delaware corporation                                                  
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|32. |  | IMCO Recycling of Utah Inc., a Delaware corporation                                                  
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|33. |  | IMCO Recycling Services Company, a Delaware corporation                                              
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|34. |  | IMCO Recycling (UK) Ltd., a private company limited by shares and organized under the laws of England
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|35. |  | IMSAMET, Inc., a Delaware corporation                                                                
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|36. |  | Imsamet of Arizona, an Arizona partnership (70%)                                                     
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|37. |  | Interamerican Zinc, Inc., a Delaware corporation                                                     
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|38. |  | MetalChem Handel GmbH, a German limited liability company                                            
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|39. |  | MetalChem, Inc., a Pennsylvania corporation                                                          
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|40. |  | Midwest Zinc Corporation, a Delaware corporation                                                     
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|41. |  | Rock Creek Aluminum, Inc., an Ohio corporation                                                       
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|42. |  | Silver Fox Holding Corp., a Delaware corporation                                                     
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|43. |  | Solar Aluminum Technology Services, a Utah partnership (50%)                                         
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|44. |  | U.S. Zinc Corporation, a Delaware corporation                                                        
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|45. |  | U.S. Zinc Export Corporation, a Texas corporation                                                    
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|46. |  | VAW-IMCO Guß und Recycling GmbH, a German limited liability company                                  
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|47. |  | Western Zinc Corporation, a California corporation                                                   
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|48. |  | Commonwealth Industries, Inc., a Delaware corporation                                                
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|49. |  | CA Lewisport, LLC, a Delaware limited liability company                                              
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|50. |  | CI Holdings, LLC, a Delaware limited liability company                                               
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|51. |  | Commonwealth Aluminum, LLC, a Delaware limited liability company                                     
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|52. |  | Commonwealth Aluminum Concast, Inc., an Ohio corporation                                             
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|53. |  | Commonwealth Aluminum Lewisport, LLC, a Delaware limited liability company                           
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|54. |  | Commonwealth Aluminum Metals, LLC, a Delaware limited liability company                              
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|55. |  | Commonwealth Aluminum Sales Corporation, a Delaware corporation                                      
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|56. |  | Commonwealth Aluminum Tube Enterprises, LLC, a Delaware limited liability company                    
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|57. |  | Commonwealth Financing Corp., a Delaware corporation                                                 
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|58. |  | Gulf Reduction Corporation, a Delaware corporation                                                   
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|59. |  | IMCO Energy Corp., a Delaware corporation