# HS code 7202.21: Ferro-silicon, containing by weight more than 55 % of silicon

> HS code 7202.21 covers ferro-silicon, containing by weight more than 55 % of silicon. It sits in heading 72.02 (ferro-alloys) in chapter 72 (iron and steel). Other goods of heading 72.02 are classified under 7202.11 (ferro-manganese, containing by weight more than 2 % of carbon), 7202.19 (ferro-manganese, other), 7202.29 (ferro-silicon, other), 7202.30 (ferro-silico-manganese) or 10 others. National tariff lines under 7202.21 are live on border.bot for the United States (4 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/720221
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 72](https://border.bot/hs-codes/72) / [72.02](https://border.bot/hs-codes/7202) / [7202.21](https://border.bot/hs-codes/720221)

## Key facts

- HS code: 7202.21
- Covers: Ferro-silicon, containing by weight more than 55 % of silicon
- Heading: [72.02: Ferro-alloys](https://border.bot/hs-codes/7202)
- Chapter: [72: Iron and steel](https://border.bot/hs-codes/72)
- Edition: HS2022
- Duty in the United States: [See its 4 lines](https://border.bot/countries/united-states/hs-codes/720221)

## What this code covers

HS code 7202.21 covers ferro-silicon, containing by weight more than 55 % of silicon.

The legal text of the subheading is “Ferro-silicon: Containing by weight more than 55 % of silicon”, read under “Ferro-silicon”, in HS2022.

## What it doesn’t cover

Other goods of heading 72.02 are classified under 7202.11 (ferro-manganese, containing by weight more than 2 % of carbon), 7202.19 (ferro-manganese, other), 7202.29 (ferro-silicon, other), 7202.30 (ferro-silico-manganese) or 10 others.

- [7202.11](https://border.bot/hs-codes/720211) Ferro-manganese: Containing by weight more than 2 % of carbon
- [7202.19](https://border.bot/hs-codes/720219) Ferro-manganese: Other
- [7202.29](https://border.bot/hs-codes/720229) Ferro-silicon: Other
- [7202.30](https://border.bot/hs-codes/720230) Ferro-silico-manganese
- [7202.41](https://border.bot/hs-codes/720241) Ferro-chromium: Containing by weight more than 4 % of carbon
- [7202.49](https://border.bot/hs-codes/720249) Ferro-chromium: Other
- [7202.50](https://border.bot/hs-codes/720250) Ferro-silico-chromium
- [7202.60](https://border.bot/hs-codes/720260) Ferro-nickel
- [7202.70](https://border.bot/hs-codes/720270) Ferro-molybdenum
- [7202.80](https://border.bot/hs-codes/720280) Ferro-tungsten and ferro-silico-tungsten
- [7202.91](https://border.bot/hs-codes/720291) Other: Ferro-titanium and ferro-silico-titanium
- [7202.92](https://border.bot/hs-codes/720292) Other: Ferro-vanadium
- [7202.93](https://border.bot/hs-codes/720293) Other: Ferro-niobium
- [7202.99](https://border.bot/hs-codes/720299) Other: Other

## How it is structured

7202.21 is a six-digit subheading. Its first two digits, 72, are the chapter; the first four, 7202, are heading 72.02; the last two, 21, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 72: Iron and steel
- Heading 72.02: Ferro-alloys
- Within the heading: Ferro-silicon
- Subheading 7202.21: Containing by weight more than 55 % of silicon

## In other countries

National tariff lines under 7202.21 are live on border.bot for the United States (4 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/720221): 4 lines, used by 1 other country

- Previous subheading: [7202.19](https://border.bot/hs-codes/720219) Ferro-manganese: Other
- Next subheading: [7202.29](https://border.bot/hs-codes/720229) Ferro-silicon: Other

## Frequently asked questions

### What does HS code 7202.21 cover?

HS code 7202.21 covers ferro-silicon, containing by weight more than 55 % of silicon.

### Which heading and chapter is HS code 7202.21 in?

HS code 7202.21 is in heading 72.02 (ferro-alloys) in chapter 72 (iron and steel).

### Where are goods of heading 72.02 classified when 7202.21 doesn’t fit?

Other goods of heading 72.02 are classified under 7202.11 (ferro-manganese, containing by weight more than 2 % of carbon), 7202.19 (ferro-manganese, other), 7202.29 (ferro-silicon, other), 7202.30 (ferro-silico-manganese) or 10 others.

### Which countries’ tariffs list national lines under HS code 7202.21?

National tariff lines under 7202.21 are live on border.bot for the United States (4 lines, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Machine-readable: https://border.bot/hs-codes/720221.json