Magnesia-Dolomite Composite Refractory Blocks
Magnesia-Dolomite Composite Refractory Blocks are composite blocks blending magnesia and dead-burned dolomite, achieving a combined MgO and CaO content exceeding 50% for basic oxygen furnace linings. These blocks are fired after shaping to provide balanced chemistry for steelmaking slags and high-temperature resistance. They are classified under 6902.10.00 as refractory ceramic constructional goods containing more than 50% of MgO or CaO.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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- HC
Consumer Products Safety · May be required
May require HC Consumer Products Safety depending on intended use (HC21) and Canadian product category (HC29, HC30, HC31, HC32, HC33, HC34, HC35, HC36, HC37); or intended use (HC22, HC23, HC24, HC26, HC27) and Canadian product category (HC37). Matching criteria: Starts With 69021000; Starts With 69021000; Equal To 6902100010; Equal To 6902100090; Equal To 6902100010; Equal To 6902100090. Logic: MATCH IF (Valid HS Code) AND (Intended Use Code) AND (Valid Canadian Product Category).
CBSA Single Window matching criteria, unknown
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the combined MgO and CaO content is 50% or less
This heading covers refractory blocks with other chemical compositions, such as silica or alumina-based.
If the product is not a ceramic article but a composite material
Articles of other mineral substances not elsewhere specified may fall under this heading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Document the combined MgO and CaO content to confirm it exceeds 50% by weight
• Ensure the blocks are fired after shaping, as per Chapter 69 requirements
• Check if the product contains any excisable goods, as statistical note 1 may apply to certain classification numbers
Related Products under Tariff item 6902.10.00
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