Section XV (Chapter 72 to 83): Base metals and articles of base metal (Chapter 77: Reserved for possible future use in the HS)

Section XV explains base metals and articles of
base metal. This section covers base metals (including those in a chemically
pure state) and many articles thereof. The section also includes native metals
separated from their gangues, and the mattes of copper, nickel or cobalt.
Metallic ores and native metals still enclosed in their gangues are excluded
(headings 26.01 to 26.17).