China HS → US HTS
China HS 8401.4020 (堆内构件): US HTS candidates & duty rates
China tariff line for "堆内构件" shares the international HS6 anchor 840140 with 1 US HTS candidate below. Compare descriptions, then calculate landed duty.
Updated
China HS 8401.4020 most commonly maps to US HTS 8401.40.00.00. Total duty rate from China (MFN + Chapter 99 overlays): about 28.30%. Verify the description before filing.
China tariff line facts
| China HS line | 8401.4020 |
|---|---|
| Description | 堆内构件 |
| Category path | 核反应堆；核反应堆的未辐照燃 料元件（释热元件）；同位素分离 机器及装置 > 核反应堆零件 > 堆内构件 |
| Shared HS6 | 840140 |
| China MFN rate (reference) | 1 |
| Schedule version | 2026 |
US HTS candidates (1)
| US HTS | Description | General (MFN) | Total from China |
|---|---|---|---|
| 8401.40.00.00 | Parts of nuclear reactors | 3.3% | 28.30% |
Total = MFN base + Section 301 / IEEPA / reciprocal overlays active for China origin. AD/CVD not included.
Frequently asked questions
Which US HTS code corresponds to China HS 8401.4020?
There is no one-to-one mapping: only the first six digits (HS6 840140) are shared internationally. Under this anchor the US schedule has 1 candidate line; the most common is 8401.40.00.00. Match your product facts (material, use, construction) against the descriptions to pick the right one.
How much is US import duty for "堆内构件" from China?
Using the leading candidate 8401.40.00.00, the total rate from China is about 28.30% — MFN base plus the Chapter 99 overlays (Section 301 / IEEPA / reciprocal) active for China origin. Other candidates may differ, so verify classification first.
Why is China HS8 not identical to US HTS8?
The WCO Harmonized System is only agreed to six digits. China extends HS6 to 8/10-digit national lines for its own tariffs and statistics, and the US does the same with HTS8/HTS10 — the extensions are independent, so codes must be bridged via HS6.
How do I confirm the final HTS classification?
Compare the US line descriptions against your product facts, check CBP rulings for similar goods, and when in doubt request a binding ruling. The bridge tool lets you re-run this query and compare all candidates side by side.