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).

Section XV (Chapters 78 to 83): Base metals and articles of base metal

Base metals and articles of base metal. Chapters 78 to 81
cover particular unwrought base metals (lead, zinc, tin and other base metals)
and products of those metals such as bars, rods, wire or sheets, as well as
articles thereof.

Chapters 82 and 83 cover certain specified articles of base
metal which, without regard to the nature of the constituent metal.

In order to classify articles of base metals, one should always check
first if they are covered in chapter 82 or 83, and if not, find the chapter
related to their constituent material.

Section XVI (Chapter 84): Nuclear reactors, boilers, machinery and mechanical appliances parts thereof

Nuclear reactors, boilers, machinery and
mechanical appliances; parts thereof. In general, Chapter 84 covers machinery
and mechanical apparatus and Chapter 85 electrical goods. However, certain
machines are specified in headings of Chapter 85 (e.g., electro-mechanical hand
tools and electro-mechanical domestic appliances) while Chapter 84 on the other
hand covers certain non-mechanical apparatus (e.g., steam generating boilers
and their auxiliary apparatus, and filtering apparatus).