# United States tariff line 3818.00.00.30: Silicon carbide wafers, doped

> In the United States tariff, line 3818.00.00.30 covers silicon carbide wafers, doped. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 3818.00 in heading 38.18 (chapter 38).

Source: https://border.bot/countries/united-states/hs-codes/3818000030
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 38](https://border.bot/countries/united-states/hs-codes/38) / [3818.00](https://border.bot/countries/united-states/hs-codes/381800) / [3818.00.00.30](https://border.bot/countries/united-states/hs-codes/3818000030)

## Key facts

- Tariff line: 3818.00.00.30
- Covers: Silicon carbide wafers, doped
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [3818.00](https://border.bot/hs-codes/381800)

## What this line covers

In the United States tariff, line 3818.00.00.30 covers silicon carbide wafers, doped.

Its legal text is “Silicon carbide wafers, doped”.

## How it is structured

It falls under HS subheading 3818.00 in heading 38.18 (chapter 38). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 38: Miscellaneous chemical products
- Heading 38.18: Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics
- Line 3818.00.00.30: Silicon carbide wafers, doped

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 3818.00.00.

## In other countries

No other national tariff on border.bot has live lines under 3818.00 yet.

- [The Harmonized System text for 3818.00](https://border.bot/hs-codes/381800)

## Other lines under 3818.00

- [3818.00.00.10](https://border.bot/countries/united-states/hs-codes/3818000010) Gallium arsenide wafers, doped
- [3818.00.00.20](https://border.bot/countries/united-states/hs-codes/3818000020) Polycrystalline silicon wafers, doped
- [3818.00.00.40](https://border.bot/countries/united-states/hs-codes/3818000040) Round (circular) shaped, as described in statistical note 2 to this chapter
- [3818.00.00.45](https://border.bot/countries/united-states/hs-codes/3818000045) Pseudo-square or rectangular in shape, as described in statistical note 3 to this chapter
- [3818.00.00.50](https://border.bot/countries/united-states/hs-codes/3818000050) Other
- [3818.00.00.91](https://border.bot/countries/united-states/hs-codes/3818000091) Other

- Previous line: [3818.00.00.20](https://border.bot/countries/united-states/hs-codes/3818000020) Polycrystalline silicon wafers, doped
- Next line: [3818.00.00.40](https://border.bot/countries/united-states/hs-codes/3818000040) Round (circular) shaped, as described in statistical note 2 to this chapter

## Frequently asked questions

### What does tariff line 3818.00.00.30 cover in the United States tariff?

In the United States tariff, line 3818.00.00.30 covers silicon carbide wafers, doped.

### What is the general (MFN) duty on 3818.00.00.30 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 3818.00.00.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/3818000030.json