Code 6903 20 · Heading 6903

Refractory ceramic retorts, crucibles, muffles, nozzles, plugs, tubes, rods and similar items containing > 50 weight percent alumina, or made from an alumina-silica mixture or compound

This covers refractory ceramic retorts, crucibles, muffles, nozzles, plugs, tubes, rods and similar items containing > 50 weight percent alumina, or made from a mixture or compound of alumina and silica. It does not cover refractory bricks, blocks, tiles or similar refractory ceramic construction materials.

For example

A refractory ceramic retort containing > 50 weight percent alumina
A refractory ceramic crucible containing > 50 weight percent alumina

See the official tariff text

Official tariff text

Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and other refractory ceramic goods, containing > 50% alumina, or a compound of alumina and silica (excl. refractory bricks, blocks, tiles and similar refractory ceramic constructional goods)

How we got to this code

XIII
69
6903
6903 20

Show the steps

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section XIII Articles of stone, plaster, cement, asbestos, mica …
Is the item made of stone, plaster, cement, asbestos, mica or a similar material; is it a ceramic product; or is it glass or glassware?
✓
Step 2 · Chapter 69 Ceramic products 2 of 3 chapters in section XIII
What kind of ceramic product is it: a silica-earth product; refractory building material; other refractory ware; brick or similar building material; roofing or other architectural building product; pipe, gutter or pipe fitting; paving, flooring or wall-covering stone or tile; laboratory, technical or agricultural container; sanitary ware; porcelain tableware or household or toilet article; non-porcelain ceramic tableware or household or toilet article; statuette or other ornament; or another ceramic product?
✓
Step 3 · Heading 6903 Retorts, crucibles, mufflers, nozzles, plugs, suppo… 3 of 13 headings under chapter 69
Which material description applies: does the product contain > 50 weight% graphite or other carbon, or a mixture of these products; contain > 50 weight% aluminium oxide “Al2O3”, or be a mixture or compound of aluminium oxide and silica “SiO2”; or none of these?
✓
Step 4 · Subheading 6903 20 Retorts, crucibles, mufflers, nozzles, plugs, suppo… 2 of 3 subheadings under heading 6903
Does the item contain < 45 weight percent alumina and > 50 weight percent of an alumina-silica mixture or compound, or does it contain >= 45 weight percent alumina and > 50 weight percent of an alumina-silica mixture or compound?

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 5.0%

2 codes below this one

Compare the sibling codes

See all 3 codes at this level

6903 10 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, slide gates and other refractory ceramic goods, containing by weight > 50% free carbon (excl. refractory bricks, blocks, tiles and similar refractory ceramic constructional goods) 5.0%
6903 20 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and other refractory ceramic goods, containing > 50% alumina, or a compound of alumina and silica (excl. refractory bricks, blocks, tiles and similar refractory ceramic constructional goods) you are here 5.0%
6903 90 Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, slide gates and other refractory ceramic goods (excl. those of siliceous fossil meals or similar siliceous earths, those of heading 6902, containing > 50% by weight of free carbon or containing > 50% by weight of alumina [Al203] or a mixture or compound of alumina and silica [SiO2]) 5.0%

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

Their lines1 Norwegian line

69.03.2000 Containing by weight more than 50 % of alumina (Al 2O 3) or of a mixture or compound

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

4.0%

Their lines2 British lines
EU originDuty free

6903 20 10 00 Containing, by weight, less than 45 % of alumina (Al 2 O 3 )

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

Their lines1 US line
Entry dateSept. 17, 2026

6903.20.00.00 Other refractory ceramic goods

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

69.03.2000

Containing by weight more than 50 % of alumina (Al 2O 3) or of a mixture or compound of alumina and of silica (SiO 2)

Ordinary duty

Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 2 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

All 2 UK lines under this code

They all have the same duty rates shown here.

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 1 US line

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

6903.20.00.00

Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths, Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.