Chromite Investment Casting Shells
Pre-formed ceramic shells using chromite flour as a stucco material, designed for precision investment casting of aerospace and turbine components. The chromite content qualifies these shells as articles of mineral substances under this tariff item, which covers other articles containing chromite.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 5% | — | 5% |
| 🇲🇽Mexico | 5% | — | 5% |
| 🇺🇸United States | 5% | — | 5% |
| 🇩🇪Germany | 5% | — | 5% |
| 🇯🇵Japan | 5% | — | 5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the shells are refractory bricks, blocks, or tiles for metallurgical coke, iron, or steel production
This sibling item covers refractory constructional products for specific metallurgical uses.
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
• Ensure the shells are classified as articles of mineral substances, not as tools or parts of Chapter 82
• Provide a detailed description of the chromite content and casting application to the CBSA
• Verify that the shells are not excluded by Chapter 68 notes, such as articles of Chapter 71 or 94
Related Products under Tariff item 6815.91.90
Chromite-Magnesite Roofing Granules
Colored granules containing chromite and magnesite applied to asphalt shingles for UV protection and aesthetics. They are classified under 6815.91.90 as other articles containing magnesite or chromite, not excluded by Chapter 68 notes.
Chromite Mullite Composite Refractories
Composite refractory shapes blending chromite and mullite, used in glass tank regenerator checkerwork. The chromite component places these under this tariff item as other articles containing chromite, offering high thermal cycling resistance.
Chromite Sand for Metal Casting Molds
Foundry-grade chromite sand used as a mold facing material in metal casting processes. As a fabricated mineral substance article containing chromite, it falls under this tariff item, providing high thermal stability for precision iron and steel castings.
Dead Burned Magnesite Balls for Sintering
Spherical dead burned magnesite aggregates used as sintering aids in refractory brick production. They are classified under 6815.91.90 as magnesia-containing articles for manufacturing processes, with high density promoting uniform brick formation.
Dolime-Based Heat Insulation Boards
Rigid insulation panels made from dolime aggregates for high-temperature industrial ovens. As fabricated articles containing dolime, they fall under this tariff item, offering a lightweight alternative to fiber insulation in petrochemical applications.
Dolime Flux Additive Pellets
Pelletized dolime flux additives used for electric furnace slag conditioning and phosphorus removal in steelmaking. These fabricated dolomite articles contain dolime and fall under this tariff item as other articles containing dolomite in dolime form.