Clay Slide Gate Refractory
Slide gate plates made of refractory clay for controlling molten steel flow in ladles during continuous casting. These are shaped from refractory clay and fired above 800°C, making them fired ceramic goods. Slide gates are explicitly named in heading 69.03, and the clay composition places them under this tariff item.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the slide gates contain more than 50% by weight of graphite or other carbon
Carbon-containing refractory slide gates are classified under the specific carbon subheading rather than the residual item.
If the slide gates contain more than 50% by weight of alumina or a mixture of silica and alumina
High-alumina refractory slide gates fall under this dedicated subheading for alumina-silica compositions.
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 slide gates are fired above 800°C, as articles heated to lower temperatures for curing are excluded from Chapter 69
• Keep supplier certificates showing the firing temperature and clay formulation for CBSA verification
• No import permit is needed for this classification
Related Products under Tariff item 6903.90.00
Alumina Ceramic Retort
A high-alumina ceramic retort designed for laboratory pyrolysis and gas synthesis reactions at temperatures exceeding 1600°C. This product is a refractory ceramic good, explicitly named in tariff item 6903.90.00, and is fired after shaping to achieve its high-temperature stability.
Alumina Crucible
A high-purity alumina ceramic crucible used for melting metals or chemicals at high temperatures in laboratories and foundries. This refractory ceramic good is designed to withstand extreme thermal and chemical stress, qualifying under tariff item 6903.90.00.
Ceramic Bushing Support
Recrystallized alumina supports holding heating element bushings in high-temperature electric furnaces. These are fired ceramic goods shaped from alumina and fired above 800°C, qualifying as refractory ceramic supports. Supports are explicitly named in heading 69.03, and the non-clay composition places them under this tariff item.
Ceramic Ladle Plunger
A zirconia-graphite ceramic plunger used for stirring molten steel in secondary refining ladles. This refractory ceramic good is high-fired for extreme corrosion resistance and falls under tariff item 6903.90.00 as an 'other' refractory product.
Ceramic Pug Mill Nozzle
A silicon carbide nozzle for high-pressure ceramic pug mills extruding clay products. This refractory nozzle resists abrasive clay slips and is classified under tariff item 6903.90.00 as an 'other' refractory ceramic good.
Ceramic Retort Tube
Fired mullite ceramic retort tube for gas purification processes at elevated temperatures in industrial chemical applications. This is shaped from mullite and fired above 800°C, making it a fired refractory ceramic good. Retort tubes are explicitly named in heading 69.03, and the non-clay composition places it under this tariff item.