8401.40.00.00
Parts of nuclear reactors
Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof
Data provenance: Rates from HTS Revision 19 (Sep 16, 2026); trade measures verified against CBP CSMS and Federal Register notices through Sep 3, 2026.
Duty rates
Column 1 (General / MFN)
3.3%
Column 2 (Non-NTR)
45%
Column 1 (Special / FTA)
Free
Eligible
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.82.03
15.0%
ActiveExcept for articles classifiable in chapters 72, 73, 74 or 76, articles where the weight of the applicable metal is less than 15 percent of the weight of the imported article, as provided for in subdivision (c) of U.S. note 16 to this subchapter
Effective from April 6, 2026
9903.82.07
10.0%
ActiveExcept as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in subdivisions (c)(ix)–(x) and (e) of U.S. note 16 to this subchapter
Effective from April 6, 2026 through December 31, 2027
9903.82.08
10.0%
ActiveExcept as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 equal to or greater than 10 percent, as provided for in subdivisions (c)(ix)–(x) and (e) of U.S. note 16 to this subchapter
Effective from April 6, 2026 through December 31, 2027
9903.82.10
15.0%
ActiveExcept as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
Effective from April 6, 2026 through December 31, 2027
9903.82.11
15.0%
ActiveExcept as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 equal to or greater than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
Effective from April 6, 2026 through December 31, 2027
9903.82.12
The duty provided in the applicable subheading + 25%
ActiveExcept as provided for in headings 9903.82.17 and 9903.85.68, derivative aluminum and steel articles the product of any country identified in general note 3(b), as provided for in subdivisions (c)(ix)–(x) of U.S. note 16 to this subchapter
Applies to origin: CU, KP, BY, RU
Effective from April 6, 2026 through December 31, 2027
9903.82.17
The duty provided in the applicable subheading + 25%
ActiveDerivative steel articles the product of the Russian Federation, as provided for in subdivision (c)(x) of U.S. note 16 to this subchapter
Applies to origin: RU
Effective from April 6, 2026 through December 31, 2027
9903.88.01
LIST_1
The duty provided in the applicable subheading plus 25%
ActiveExcept as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Applies to origin: CN
Effective from July 6, 2018
Rate-change history
What the rate was before, and when it changed. The government schedule replaces each revision in place; we keep the timeline.
-
RATE_INCREASE USITC HTS Revision 2026.7
Rate increase on 9903.82.11: 0% → 15% (Section 232 combined metals)
See the change → -
RATE_INCREASE USITC HTS Revision 2026.7
Rate increase on 9903.82.08: 0% → 10% (Section 232 combined metals)
See the change → -
RATE_INCREASE USITC HTS Revision 2026.7
Rate increase on 9903.82.03: 0% → 15% (Section 232 combined metals)
See the change → -
SCOPE_EXPANSION Proclamation April 2, 2026 - Combined Metals
Section 232 steel scope expanded: 523 HTS codes added under combined-metals framework
See the change → -
NEW_PROGRAM Proclamation April 2, 2026 - Combined Metals
Combined Section 232 metals framework introduced — 16 new Chapter 99 codes (9903.82.02–17)
See the change → -
NEW_PROGRAM Executive Order Feb 1, 2026 — Reciprocal Tariff (FR 2026-03824)
Section 122 reciprocal surcharge in effect — additional 10% on most imports through July 24, 2026
See the change → -
Base rate HTS 2023
Column 1 general rate set to 3.3%.
Related CBP rulings
Other codes in heading 8401
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 8401.40.00.00 from each major US trading partner.
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