Exhibit 21.1

Subsidiaries of Aleris International, Inc.

as of April 2, 2007



|    |  |                                                                                           |  |                                                          
|--- |  | ----------------------------------------------------------------------------------------- |  | ---------------------------------------------------------
|    |  | Subsidiary                                                                                |  | State or otherjurisdiction
ofincorporation ororganization
|1.  |  | Alchem Aluminum, Inc.                                                                     |  | Delaware                                                 
|2   |  | Alchem Aluminum Shelbyville Inc.                                                          |  | Delaware                                                 
|3.  |  | Aleris Aluminum Austria GmbH f/k/a Corus Aluminium Verkauf GmbH                           |  | Austria                                                  
|4.  |  | Aleris Aluminum Bitterfeld GmbH f/k/a Corus Aluminium Profiltechnik Bitterfeld GmbH       |  | Germany                                                  
|5.  |  | Aleris Aluminum Bonn GmbH f/k/a Corus Aluminium Profiltechnik Bonn GmbH                   |  | Germany                                                  
|6.  |  | Aleris Aluminum Canada Holding 2, Inc. f/k/a Corus Aluminium Inc.                         |  | Canada                                                   
|7.  |  | Aleris Aluminum Canada L.P. f/k/a Corus L.P.                                              |  | Canada                                                   
|8.  |  | Aleris Aluminum Denmark ApS                                                               |  | Denmark                                                  
|9.  |  | Aleris Aluminum Duffel BVBA f/k/a Corus Aluminium BVBA                                    |  | Belgium                                                  
|10. |  | Aleris Aluminum Europe, Inc. f/k/a Hoogovens Aluminium Europe Inc.                        |  | Delaware                                                 
|11. |  | Aleris Aluminum France SAS                                                                |  | France                                                   
|12. |  | Aleris Aluminum GmbH f/k/a Corus Aluminium GmbH                                           |  | Germany                                                  
|13. |  | Aleris Aluminum Italy Srl f/k/a Corus Aluminium Rolled Products, Italia Srl               |  | Italy                                                    
|14. |  | Aleris Aluminum Japan, Ltd. f/k/a Corus Aluminium Japan, Ltd.                             |  | Japan                                                    
|15. |  | Aleris Aluminum Koblenz GmbH f/k/a Corus Aluminium Walzprodukte GmbH                      |  | Germany                                                  
|16. |  | Aleris Aluminum Netherlands B.V. f/k/a Corus Aluminium Rolled Products B.V.               |  | Netherlands                                              
|17. |  | Aleris Aluminum Sales Europe GmbH f/k/a Aleris Aluminium Products GmbH                    |  | Germany                                                  
|18. |  | Aleris Aluminum Service Center NV f/k/a Corus Aluminium Service Center NV                 |  | Belgium                                                  
|19. |  | Aleris Aluminum Spain, S.A. f/k/a Corus Aluminium Espana SA                               |  | Spain                                                    
|20. |  | Aleris Aluminum UK Limited                                                                |  | United Kingdom                                           
|21. |  | Aleris Aluminum U.S. Sales, Inc. f/k/a Corus Aluminium Corp.                              |  | Delaware                                                 
|22. |  | Aleris Aluminum Vogt GmbH f/k/a Corus Aluminium Profiltecknik GmbH                        |  | Germany                                                  
|23. |  | Aleris Aluminum Vogt GmbH [sp z.o.o.] f/k/a Corus Aluminium Profiltechnik GmbH sp. z o.o. |  | Poland                                                   
|24. |  | Aleris Asia Pacific International (Barbados) Ltd.                                         |  | Barbados                                                 
|25. |  | Aleris Asia Pacific Limited                                                               |  | Hong Kong                                                
|26. |  | Aleris Asia Pacific Zinc (Barbados) Ltd.                                                  |  | Barbados                                                 
|27. |  | Aleris Belgium BVBA                                                                       |  | Belgium                                                  
|28. |  | Aleris Blanking and Rim Products, Inc. (formerly Indiana Aluminum Inc.)                   |  | Indiana                                                  
|29. |  | Aleris Deutschland Beteiligungsunternehmen Duffel GmbH                                    |  | Germany                                                  
|30. |  | Aleris Deutschland Holding GmbH                                                           |  | Germany                                                  
|31. |  | Aleris Deutschland Vier GmbH Co KG                                                        |  | Germany                                                  
|32. |  | Aleris Deutschland Vierte Verwaltungs GmbH1                                               |  | Germany                                                  
|33. |  | Aleris do Brasil Holding Ltda. (formerly IMCO Brazil Holding Ltda.)                       |  | Brazil                                                   
|34. |  | Aleris Gibraltar Limited                                                                  |  | Gibraltar                                                
|35. |  | Aleris Global Luxembourg S.a.r.l                                                          |  | Luxembourg                                               
|36. |  | Aleris Holding Belgium BVBA                                                               |  | Belgium                                                  
|37. |  | Aleris Holding Canada Limited                                                             |  | Canada                                                   
|38. |  | Aleris Holding Luxembourg S.a.r.l                                                         |  | Luxembourg                                               
|39. |  | Aleris Holding Luxembourg S.a.r.l & Co. KG                                                |  | Germany                                                  
|40. |  | Aleris Hylite B.V. f/k/a Corus Hylite B.V.                                                |  | Netherlands                                              
|41. |  | Aleris Inc.                                                                               |  | Delaware                                                 



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|1 | 50% owned.
|- | ----------



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|    |  |                                                                                                                                        |  |                                                          
|--- |  | -------------------------------------------------------------------------------------------------------------------------------------- |  | ---------------------------------------------------------
|    |  | Subsidiary                                                                                                                             |  | State or otherjurisdiction
ofincorporation ororganization
|42. |  | Aleris Latasa Reciclagem S.A.                                                                                                          |  | Brazil                                                   
|43. |  | Aleris Luxembourg S.a.r.l                                                                                                              |  | Luxembourg                                               
|44. |  | Aleris Mexico, S. de R.L. de C.V. (formerly IMCO Reciclaje de Mexico, S. de R.L. de C.V.)                                              |  | Mexico                                                   
|45. |  | Aleris New Gibraltar Limited                                                                                                           |  | Gibraltar                                                
|46. |  | Aleris Nuevo Leon, S. de R.L. de C.V. (formerly IMCO Reciclaje de Nuevo Leon, S. de R.L de C.V.)                                       |  | Mexico                                                   
|47. |  | Aleris Ohio Management, Inc.                                                                                                           |  | Delaware                                                 
|48. |  | Aleris Reciclagem Ltda. (formerly IMCO Reciclagem de Materiais Indústria e Comércio Ltda.)                                             |  | Brazil                                                   
|49. |  | Aleris Reciclaje Servicios Administrativos, S. de R.L. de C.V. (formerly IMCO Reciclaje Servicios Administrativos, S. de R.L. de C.V.) |  | Mexico                                                   
|50. |  | 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.)  |  | Mexico                                                   
|51. |  | Aleris Recycling (German Works) GmbH f/k/a VAW-IMCO Guß und Recycling GmbH                                                             |  | Germany                                                  
|52. |  | Aleris Recycling Holding B.V. f/k/a IMCO Recycling Holding B.V.                                                                        |  | Netherlands                                              
|53. |  | Aleris Recycling Netherlands B.V.                                                                                                      |  | Netherlands                                              
|54. |  | Aleris Recycling (Swansea) Ltd. f/k/a IMCO Recycling (UK) Ltd.                                                                         |  | United Kingdom                                           
|55. |  | Aleris (Shanghai) Trading Co. Ltd.                                                                                                     |  | China                                                    
|56. |  | Aleris South America Ltda.                                                                                                             |  | Brazil                                                   
|57. |  | Aleris Switzerland GmbH                                                                                                                |  | Switzerland                                              
|58. |  | Aleris Technology (Netherlands) BV                                                                                                     |  | Netherlands                                              
|59. |  | Aleris US Zinc (Changshu) Co. Ltd.                                                                                                     |  | China                                                    
|60. |  | Alerisalu Aluminum Portugal, Unipessoal, Lda. (formerly Hoogovens Aluminium Portugal Lda.)                                             |  | Portugal                                                 
|61. |  | ALSCO Holdings, Inc.                                                                                                                   |  | Delaware                                                 
|62. |  | ALSCO Metals Corporation                                                                                                               |  | Delaware                                                 
|63. |  | Alumitech, Inc.                                                                                                                        |  | Delaware                                                 
|64. |  | Alumitech of Cleveland, Inc.                                                                                                           |  | Delaware                                                 
|65. |  | Alumitech of Wabash, Inc.                                                                                                              |  | Indiana                                                  
|66. |  | Alumitech of West Virginia, Inc.                                                                                                       |  | Delaware                                                 
|67. |  | AWT Properties, Inc.                                                                                                                   |  | Ohio                                                     
|68. |  | BUG-Alutechnik GmbH                                                                                                                    |  | Germany                                                  
|69. |  | CA Lewisport, LLC                                                                                                                      |  | Delaware                                                 
|70. |  | CI Holdings, LLC                                                                                                                       |  | Delaware                                                 
|71. |  | Commonwealth Aluminum, LLC                                                                                                             |  | Delaware                                                 
|72. |  | Commonwealth Aluminum Concast, Inc.                                                                                                    |  | Ohio                                                     
|73. |  | Commonwealth Aluminum Lewisport, LLC                                                                                                   |  | Delaware                                                 
|74. |  | Commonwealth Aluminum Metals, LLC                                                                                                      |  | Delaware                                                 
|75. |  | Commonwealth Aluminum Sales Corporation                                                                                                |  | Delaware                                                 
|76. |  | Commonwealth Aluminum Tube Enterprises, LLC                                                                                            |  | Delaware                                                 
|77. |  | Commonwealth Financing Corp.                                                                                                           |  | Delaware                                                 
|78. |  | Commonwealth Industries, Inc.                                                                                                          |  | Delaware                                                 
|79. |  | Corus Aluminium Extrusions Tianjin Co Ltd2                                                                                             |  | China                                                    
|80. |  | Corus Aluminium Japan Ltd.                                                                                                             |  | Japan                                                    
|81. |  | Duinlust Grundstucks GmbH                                                                                                              |  | Germany                                                  
|82. |  | Dutch Aluminum C.V.                                                                                                                    |  | Netherlands                                              
|83. |  | E Street Acquisition Corporation                                                                                                       |  | Delaware                                                 
|84. |  | ETS Schaefer Corporation                                                                                                               |  | Ohio                                                     
|85. |  | Grundstucksverwaltungsgesellschaft Objekt Wallershein GmbH                                                                             |  | Germany                                                  
|86. |  | Gulf Reduction Corporation                                                                                                             |  | Delaware                                                 
|87. |  | Hoogovens Aluminium Portugal Lda                                                                                                       |  | Portugal                                                 
|88. |  | IMCO Indiana Partnership L.P.                                                                                                          |  | Indiana                                                  
|89. |  | IMCO International, Inc.                                                                                                               |  | Delaware                                                 



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|2 | 61% owned.
|- | ----------



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|     |  |                                    |  |                                                          
|---- |  | ---------------------------------- |  | ---------------------------------------------------------
|     |  | Subsidiary                         |  | State or otherjurisdiction ofincorporation
ororganization
|90.  |  | IMCO Investment Company            |  | Delaware                                                 
|91.  |  | IMCO Management Partnership L.P.   |  | Texas                                                    
|92.  |  | IMCO Recycling of California, Inc. |  | Delaware                                                 
|93.  |  | IMCO Recycling of Idaho Inc.       |  | Delaware                                                 
|94.  |  | IMCO Recycling of Illinois Inc.    |  | Illinois                                                 
|95.  |  | IMCO Recycling of Indiana Inc.     |  | Delaware                                                 
|96.  |  | IMCO Recycling of Michigan L.L.C.  |  | Delaware                                                 
|97.  |  | IMCO Recycling of Ohio Inc.        |  | Delaware                                                 
|98.  |  | IMCO Recycling of Utah Inc.        |  | Delaware                                                 
|99.  |  | IMCO Recycling Services Company    |  | Delaware                                                 
|100. |  | IMCO Recycling (UK) Ltd.           |  | England                                                  
|101. |  | IMSAMET, Inc.                      |  | Delaware                                                 
|102. |  | Imsamet of Arizona3                |  | Arizona                                                  
|103. |  | Interamerican Zinc, Inc.           |  | Delaware                                                 
|104. |  | MetalChem Handel GmbH              |  | Germany                                                  
|105. |  | MetalChem, Inc.                    |  | Pennsylvania                                             
|106. |  | Midwest Zinc Corporation           |  | Delaware                                                 
|107. |  | Rock Creek Aluminum, Inc.          |  | Ohio                                                     
|108. |  | Silver Fox Holding Corp.           |  | Delaware                                                 
|109. |  | U.S. Zinc Corporation              |  | Delaware                                                 
|110. |  | U.S. Zinc Export Corporation       |  | Texas                                                    
|111. |  | Western Zinc Corporation           |  | California                                               



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|3 | 70% owned.
|- | ----------