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
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 pure magnesite without chrome or binders
Raw magnesite is Chapter 25 flux; mixing creates Chapter 38 composition.
If pre-cast into blocks or slabs
Shaped refractory products move to Chapter 69 ceramics.
If primarily zinc oxide-based variant
Different oxide compositions may shift to specific chemical headings.
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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
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