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Magnesia-Chrome Refractory Concrete

A ready-mix concrete using magnesia, chrome ore, and phosphate binders for erosion-resistant linings in non-ferrous metal smelters. Under HTS 3816.00.20 as other refractory concretes, it offers superior slag resistance at 1600-1800°C. Common in copper and nickel production.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3%+37.5%40.5%
🇲🇽Mexico3%+10.0%13%
🇨🇦Canada3%+10.0%13%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+12.5%12.5%

More Specific Codes

This product may fall under a more specific subheading:

3816.00.20.10Clay
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3816.00.20.50Other
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Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2520.20.00Lower: 37.5% vs 40.5%

If pure magnesite without chrome or binders

Raw magnesite is Chapter 25 flux; mixing creates Chapter 38 composition.

6902.10.10Lower: 37.5% vs 40.5%

If pre-cast into blocks or slabs

Shaped refractory products move to Chapter 69 ceramics.

2817.00.00Lower: 25% vs 40.5%

If primarily zinc oxide-based variant

Different oxide compositions may shift to specific chemical headings.

Not sure which classification is right?

The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.

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Import Tips & Compliance

• Include EPA compliance docs for chrome content; declare hexavalent chromium levels accurately

• Ship in moisture-proof containers to prevent premature setting; specify shelf life on labels

Related Products under HTS 3816.00.20

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Pneumatic-applied mix with andalusite for wear-resistant coatings in blast furnaces. Classified HTS 3816.00.20 as other refractory compositions, high mullite formation for thermal stability.

Silicon Carbide Refractory Mortar

Abrasion-resistant mortar with SiC grains for cyclone burners and burners. HTS 3816.00.20 other mortars, extreme hardness at 1500°C.

Dolomite-Silica Ramming Mix

Blended ramming for coreless induction furnaces, near 3816.00.10 but 'other' if modified. HTS 3816.00.20.

Bauxite Grain Refractory Concrete

Aggregate bauxite concrete for ladle impact zones.

Mullite Refractory Castable

Synthetic mullite for petrochemical heaters.

Kaolin Clay Refractory Mortar

High-purity kaolin for pottery kilns.