Found 9 matching results
(CN → US)
| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 6805100000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 6805200000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 6807100000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 6807900050 | Doc | 57.7% | CN | US | 2025-05-12 |
| 2811295000 | Doc | 58.7% | CN | US | 2025-05-12 |
| 2811291000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 2849905000 | Doc | 58.7% | CN | US | 2025-05-12 |
| 2849905000 | Doc | 58.7% | CN | US | 2025-05-12 |
| 2850005000 | Doc | 58.7% | CN | US | 2025-05-12 |
Abrasive
An abrasive is a material used for shaping or finishing workpieces through the controlled removal of material. This removal is achieved through friction and typically involves micro-cutting or micro-fracturing of the workpiece.
Material Composition
Abrasives are categorized into two main groups:
- Natural Abrasives: These are minerals occurring naturally. Examples include:
- Diamond: The hardest known natural material, used for cutting extremely hard materials.
- Corundum: Includes ruby and sapphire; used in grinding wheels and sandpaper.
- Garnet: Used for sandblasting and waterjet cutting.
- Quartz: Commonly found in sand and used for sandblasting.
- Tripoli: A soft siliceous earth used as a polishing agent.
- Synthetic Abrasives: Manufactured for specific properties and consistency. Examples include:
- Aluminum Oxide (Al₂O₃): A common abrasive used in grinding wheels, sandpaper, and polishing compounds. Available in various grades and purities.
- Silicon Carbide (SiC): Harder than aluminum oxide, used for cutting harder materials and in applications requiring fast cutting rates.
- Ceramic Abrasives: Engineered materials offering high toughness and long life, often used in precision grinding.
- Cubic Boron Nitride (CBN): Second only to diamond in hardness, used for machining hardened steels and superalloys.
- Diamond (Synthetic): Produced through high-pressure, high-temperature processes, offering consistent quality and controlled particle size.
Purpose & Function
The primary purpose of abrasives is material removal. This is achieved through several mechanisms:
- Micro-cutting: Sharp abrasive grains shear away small particles of the workpiece.
- Micro-fracturing: Abrasive grains induce fractures within the workpiece, leading to material removal.
- Plastic Deformation: Softer materials can be deformed by the abrasive action.
Usage Scenarios
Abrasives are employed in a wide range of applications:
- Machining: Grinding, honing, lapping, polishing, and deburring of metals, ceramics, plastics, and composites.
- Cutting: Abrasive wheels for cutting concrete, tile, and other hard materials.
- Finishing: Polishing of surfaces to achieve desired smoothness and reflectivity.
- Cleaning: Sandblasting, shot blasting, and abrasive blasting for surface preparation and cleaning.
- Waterjet Cutting: Garnet abrasive is commonly used in waterjet cutting systems.
- Dental Applications: Polishing and shaping of dental materials.
Common Types & Forms
Abrasives are available in various forms:
- Grinding Wheels: Bonded abrasive particles in a matrix (e.g., resin, vitrified, rubber).
- Sandpaper: Abrasive particles coated on paper backing.
- Abrasive Cloth: Similar to sandpaper but using a cloth backing, often used for polishing.
- Abrasive Blasting Media: Granular abrasives used in sandblasting equipment.
- Polishing Compounds: Fine abrasive particles suspended in a carrier fluid or wax.
- Loose Abrasives: Used in lapping, polishing, and waterjet cutting.
- Coated Abrasives: Abrasive particles bonded to flexible substrates like belts and discs.
Abrasive materials fall under several classifications depending on the base material they are mounted on.
Here are the relevant HS codes based on the provided information:
- 6805.10.0000: This HS code covers natural or artificial abrasive powder or grain mounted on a base of woven textile fabric. Chapter 68 relates to articles of stone, plaster, cement, asbestos, mica or similar materials. Heading 6805 specifically concerns abrasive products. Subheading 6805.10 focuses on products with a woven textile fabric base. The total tax rate is 55.0%, comprised of a 0.0% base tariff and a 25.0% additional tariff, increasing to 30.0% after April 2, 2025.
- 6805.20.0000: This HS code covers natural or artificial abrasive powder or grain mounted on a base of paper or paperboard only. Similar to 6805.10.0000, this falls under Chapter 68, Heading 6805 (abrasive products), but specifically for paper or paperboard bases. The total tax rate is 55.0%, with a 0.0% base tariff and a 25.0% additional tariff, increasing to 30.0% after April 2, 2025.
It is important to determine the exact base material (woven textile fabric or paper/paperboard) to select the correct HS code.