Harmonized Tariff Schedule of the United States · HTS code · HS 6815.91
6815.91.00: Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite
Not declarable on its own: use one of its 2 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 6815 Articles of stone or of other mineral substances (including carbon fibers, articles of carbon fibers and articles of peat), not elsewhere specified or included:
- Other articles:
- 6815.91.00 Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 24 September 2018
- Legal act
- HTSUS 9903.88.03
Subdivisions
- 6815.91.00 Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite Free
- 6815.91.00.11 Containing by weight more than 70 percent magnesia, expressed as MgO, with carbon content ranging from trace amounts to less than 30 percent, and chemically bonded by resin or pitch kg
- 6815.91.00.71 Other kg
Same subheading in other tariffs
UK Free Third-country duty 1 tariff line 
EU Free Third-country duty 1 tariff line 
Türkiye Free Third-country duty 2 tariff lines 
Canada Free – 5% Third-country duty 2 tariff lines · average 2.5% 
Mexico Free – 5% Third-country duty 3 tariff lines · average 1.7% 
Brazil 12.6% Third-country duty 2 tariff lines 
Argentina 12.6% Third-country duty 2 tariff lines 
Peru Free Third-country duty 1 tariff line 
New Zealand Free Third-country duty 1 tariff line 
Japan Free Third-country duty 1 tariff line 
Taiwan 10% Third-country duty 1 tariff line 
GCC 5% Third-country duty 3 tariff lines 
Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 1 tariff line 
North Macedonia 15% Third-country duty 1 tariff line 
Nigeria 20% Third-country duty 1 tariff line Legal notes
Code history
Since 2022; before, these goods were classified under 6815.99.
HTS code 6815.91.00 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 6815.91 (containing magnesite, magnesia in the form of periclase, dolomite including in…).
The general duty is free.
2 statistical sub-lines below it are used in the declaration.
For the same subheading, the UK duty is free, the EU duty is free, the Türkiye duty is free, the Canada duty is 0%–5%, the Mexico duty is 0%–5%, the Brazil duty is 12.6%, the Argentina duty is 12.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is free, the Taiwan duty is 10%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 15% and the Nigeria duty is 20%.
The United States imported goods of subheading 6815.91 worth US$46m in 2024; the largest supplier was Brazil.
Questions and answers
What is the USA import duty for HTS code 6815.91.00?
The general duty in the Harmonized Tariff Schedule of the United States is free. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 6815.91 as a whole, the largest supplier in 2024 was Brazil (US$31m), followed by Austria.