Product classification
HS code for Magnesia bricks: 6902.10
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, containing by weight, singly or together, more than 50% of the elements Mg, Ca or Cr, expressed as MgO, CaO or Cr2o3.
Classification of magnesia bricks under HS 6902.10
Magnesia bricks are classified under HS code 6902.10. This classification applies to refractory bricks, blocks, tiles, and similar refractory ceramic constructional goods. To fall under this specific subheading, the product must contain more than 50% by weight of the elements Magnesium (Mg), Calcium (Ca), or Chromium (Cr), calculated as MgO, CaO, or Cr2O3. These bricks are essential in high-temperature industrial applications, such as lining furnaces, kilns, and reactors. The classification is based on the material's ability to resist temperatures exceeding 1,500°C and its specific chemical composition. Chapter 69 covers ceramic products, and heading 6902 is reserved for refractory goods, distinguishing them from standard ceramic building materials found in heading 6904 or 6905.
- Covers
- Magnesite-chrome refractory bricks
- Dead-burned magnesite bricks
- Magnesia-carbon bricks for steel furnaces
- Fused magnesia refractory blocks
- Basic refractory tiles for cement kilns
- Also under 6902.10
- RHI Magnesita magnesia bricks
- Vesuvius refractory linings
- Magnezit Group dolomite bricks
- Calderys basic refractories
Codes often confused with 6902.10
Common mistake. Magnesia bricks are often confused with HS code 6810.11, which covers building bricks made of cement or concrete. However, 6810 items are not refractory. Another common error is misclassifying them under 6901.00, which is reserved for bricks made of siliceous fossil meals (like kieselguhr). The critical differentiator for 6902.10 is the magnesium content exceeding the 50% threshold and the refractory nature of the ceramic.
Top exporters and importers of HS 690210 (the code used for magnesia bricks), 2025
In 2025, the largest exporter of HS 690210 (the code used for magnesia bricks) in UN Comtrade data was China, with 51% of world exports; the largest importer in UN Comtrade data was the United States, with 7.7% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 690210, not only magnesia bricks.
Top exporters 2025 · share of world exports
- 1 China $767M 51% of world exports
- 2 Austria $180M 12% of world exports
- 3 Germany $147M 9.8% of world exports
World total: $1.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $121M 7.7% of world imports
- 2 India $117M 7.5% of world imports
- 3 Indonesia $108M 6.9% of world imports
World total: $1.6B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for magnesia bricks
Brazil splits HS 6902.10 into 4 NCM codes. Pick the one that matches your product:
- 6902.10.11Bricks or slabs over 90% dichromium trioxide
- 6902.10.18Other magnesian or chrome refractory bricks
- 6902.10.19Other magnesian or chrome refractory goods
- 6902.10.90Other refractories over 50% MgO, CaO or Cr2O3
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about magnesia bricks
What is the HS code for Magnesia bricks?
The HS code for Magnesia bricks is 690210 (Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight, singly or together, more than 50% of the elements Mg, Ca or Cr, expressed as MgO, CaO or Cr2o3). The HS code for magnesia bricks is 6902.10, specifically for refractory ceramic goods containing more than 50% magnesium, calcium, or chromium oxides.
How do I classify Magnesia bricks for customs?
Magnesia bricks is classified under HS code 690210 — Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight, singly or together, more than 50% of the elements Mg, Ca or Cr, expressed as MgO, CaO or Cr2o3. This is a 6-digit subheading level code.
Do these bricks include those used for residential fireplaces?
While some residential firebricks are refractory, they only fall under 6902.10 if they meet the specific 50% magnesium/calcium/chromium weight requirement; otherwise, they may fall under 6902.20 or 6902.90.
Which countries are the top exporters of magnesia bricks (HS 690210)?
In 2025, the top exporters of HS 690210 (the code used for magnesia bricks) in UN Comtrade data were China ($767M, 51% of world exports), Austria ($180M) and Germany ($147M). World exports came to about $1.5B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of magnesia bricks (HS 690210)?
In 2025, the top importers of HS 690210 (the code used for magnesia bricks) in UN Comtrade data were the United States ($121M, 7.7% of world imports), India ($117M) and Indonesia ($108M). World imports came to about $1.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Magnesia bricks the same in all countries?
The base HS code 690210 for Magnesia bricks is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for magnesia bricks in Brazil?
Brazil splits HS 690210 into 4 NCM codes, so the right one for magnesia bricks depends on the product's details: 6902.10.11 (Bricks or slabs over 90% dichromium trioxide), 6902.10.18 (Other magnesian or chrome refractory bricks), 6902.10.19 (Other magnesian or chrome refractory goods), 6902.10.90 (Other refractories over 50% MgO, CaO or Cr2O3).