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HSChapter 68
U.S. imports of articles containing magnesite, periclase, dolomite, or chromite (HS 681591) totaled $3.2M in April 2026, traded with 16 countries.
Importers of Articles Containing Magnesite, Periclase, Dolomite, or Chromite paid $339K in duties in April 2026 — an effective duty rate of 10% on $3.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataRefractory and industrial articles of stone or mineral substances containing magnesite, magnesia in periclase form, dolomite, or chromite — used primarily as furnace linings, kiln furniture, and high-temperature industrial components — are classified under heading 681591. The US schedule subdivides this heading by magnesium oxide content, with 6815910011 covering articles where magnesite, dolomite, or chromite exceeds 70% by weight, while 6815910071 and 6815910100 cover remaining NESOI articles. Austria leads US imports under this heading, reflecting its established magnesia refractories industry, with Brazil and Spain also significant sources. These materials are critical inputs for steelmaking, cement production, and glass manufacturing, where thermal stability and chemical resistance are paramount.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The US tariff schedule distinguishes articles where magnesite, dolomite, or chromite content exceeds 70% by weight (6815910011) from other articles under this heading (6815910071 and 6815910100). Importers must have laboratory analysis or manufacturer certification of the mineral composition to support the correct 10-digit classification. Misclassification between these lines can affect duty liability, so chemical composition documentation should accompany the commercial invoice.
Heading 6902 covers refractory bricks, blocks, tiles, and similar ceramic goods that have been fired during manufacture — the firing process is the key distinction. Articles under 681591 are made of stone or mineral substances but are not necessarily fired ceramic products; they may be chemically bonded or otherwise processed without kiln firing. If a product has been fired to produce a ceramic structure, it likely belongs in Chapter 69 rather than Chapter 68.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 6815910011 | ARTCLS CNTNG MAGNT, DOLMT OR CHRMT BY WGHT >70 MAG | $3.1M | 10.00% | $307K |
| 6815910071 | ARTCLS NESOI CNTNG MAGNESITE, DOLMT OR CHROMITE | $175K | 18.76% | $32K |
ARTCLS CNTNG MAGNT, DOLMT OR CHRMT BY WGHT >70 MAG
ARTCLS NESOI CNTNG MAGNESITE, DOLMT OR CHROMITE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6815910100 | ARTCLS NESOI CNTNG MAGNESITE, DOLMT OR CHROMITE | $3.0M |
ARTCLS NESOI CNTNG MAGNESITE, DOLMT OR CHROMITE
1.5M kg
OTHR ARTS NESOI OF CMNT ETC
HS 681099
MARBLE, TRAVERTINE AND ALABASTER, WORKD, NESOI
HS 680291
WORDK MONUMENTAL OR BUILDING STONE, NESOI
HS 680299
GRANITE, NESOI
HS 680293
ABRASIVES ON A BASE MATERIAL OTH THN FABRC O PAPER
HS 680530
ARTICLES OF ASPHALT OR SIMILAR MATERIALS IN ROLLS
HS 680710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Pennsylvania | $36K | $2.1M | +$2.0M |
| Alabama | $1.5M | -- | -$1.5M |
| Ohio | $613K | $760K | +$148K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| MOBILE, AL | $1.4M | -- | -$1.4M |
| BALTIMORE, MD | $15K | $1.0M | +$1.0M |
| NORFOLK-NEWPORT NEWS, VA | $771K | -- | -$771K |