Chapter 72 Iron and steel Chapter 73 Articles of iron or stee lChapter 74 Copper and articles thereof Chapter 75 Nickel and articles thereof Chapter 76 Aluminum and articles thereofChapter 77(Reserved for possible future use) Chapter 78 Lead and articles thereof Chapter 79 Zinc and articles thereof Chapter 80 Tin and articles thereof Chapter 81 Other base metals; cermets; articles thereof Chapter 82 Tools, implements, cutlery, spoons and forks, of base metal; parts thereof of base metal Chapter 83 Miscellaneous articles of base metal