Low Chrome Cast Steel Grinding Balls
Cast steel balls with 1-10% chromium content, engineered for semi-autogenous grinding (SAG) mills in mining operations. Their cast construction and specific use as mill grinding media place them under tariff item 7325.91.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +50.0% | 50% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 balls are forged rather than cast
Forged grinding balls are classified under other articles of iron or steel.
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 casting process and alloy composition for customs clearance
• Ensure the balls meet the definition of 'cast articles' under Chapter 73
• Verify if any trade remedies apply to grinding media from specific countries
Related Products under Tariff item 7325.91.00
Cast Iron Sag Mill Grinding Media Balls
Heavy-duty cast iron balls designed for SAG and AG mills, featuring domed surfaces that promote optimal cascading action. Their cast iron composition and specific grinding function for mills place them under tariff item 7325.91.00 as other cast articles of iron or steel.
Chrome-Moly Cast Grinding Balls for Cement Mills
Chromium-molybdenum alloy cast balls optimized for cement clinker grinding in tube mills. Their cast structure and mill-specific design align with tariff item 7325.91.00 as grinding balls for mills, providing extended wear life in high-abrasion environments.
Forged Alloy Steel Mill Grinding Balls
These are alloy steel balls used in ball mills for grinding ores, coal, and other materials. Although some are forged, those that are cast and heat-treated for toughness are classified here as cast articles of iron or steel, specifically as grinding balls for mills.
Heat-Treated Cast Steel Mill Balls 75mm
Uniform 75mm diameter cast steel balls, double heat-treated for maximum abrasion resistance in secondary grinding circuits. These are specifically classified under tariff item 7325.91.00 as cast grinding balls for mills, given their cast steel construction and standard size.
High Chrome Cast Iron Grinding Balls
Cast iron grinding balls with high chromium content (10-18%), used in ball mills for grinding ores and minerals. They fall under tariff item 7325.91.00 as cast articles of iron or steel specifically designed for mill grinding applications.
Martensitic Cast Grinding Media for Coal Mills
Martensitic white iron cast balls for pulverizing coal in thermal power plants. Tariff item 7325.91.00 applies due to their cast construction and mill grinding purpose, engineered for low contamination in fuel processing.