Analysis
Heading 7405 of the Harmonized Tariff Schedule covers master alloys of copper. It has 2 tariff lines.
Every one of its 2 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.
Its lines are 7405.00.10 for containing by weight 5 percent or more but not more than 15… (duty-free) and 7405.00.60 for master alloys of copper: other (duty-free).
Its median rate of duty-free sits at the 6th percentile of the headings in chapter 74.
By Census's concordance, most of its statistical lines are made by Nonferrous Metal (except Aluminum) Smelting and Refining (331410). Those are the NAICS industries a US producer of these goods would report under.
The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 7405.00.10 | Containing by weight 5 percent or more but not more than 15 percent of phosphorus | Free |
| 7405.00.60 | Master alloys of copper: other | Free |