HTS US: 2951.XX.XXXX
Description
Heading 2951 pertains to carbides of silicon, primarily silicon carbide (SiC), a compound widely used in various industrial applications due to its hardness, thermal conductivity, and chemical stability. Silicon carbide is an important material in abrasives, refractory products, ceramics, and semiconductors.
This heading includes:
- Crude silicon carbide and other carbides of silicon.
- Artificially produced silicon carbide, including powders and granules.
- Forms intended for industrial use, such as abrasive grains and refractory materials.
It excludes compounds where silicon carbide is combined with other elements or processed into finished products classified elsewhere.
Code Hierarchy
- Section VI: Products of the Chemical or Allied Industries (Chapters 28-38)
- Chapter 29: Organic Chemicals
- Heading 2951: Carbides of silicon
- US HTS Code (10-digit):
2951.XX.XXXX– Specific codes designate product forms and grades.
Detailed Breakdown of Subheadings
The 4-digit HS heading 2951 covers all carbides of silicon, but the United States HTS system further breaks it down by specific product forms and purity grades. Although no sub-codes are listed in the provided database extract, the general structure is as follows:
| HS/HTS Code | Description | Examples & Notes |
|---|---|---|
| 2951.00 | Carbides of silicon | Crude or artificial silicon carbide, powder or granules, used as abrasives or refractory materials. |
2951.00.0000 |
Silicon carbide, crude or artificial | Basic industrial grade silicon carbide, commonly used in grinding wheels, cutting tools, and refractory bricks. |
What is NOT Classified Here?
Important exclusions to avoid misclassification:
- Silicon wafers and semiconductor devices containing silicon carbide fall under electronic component classifications, not 2951.
- Carbides combined with metals or other compounds forming alloys or composite materials are classified elsewhere.
- Finished abrasive products such as grinding wheels or sandpapers are classified under Chapter 68 or 84.
- Other chemical compounds of silicon that are not carbides are classified under different headings.
Notes
- Industrial Applications: Silicon carbide is prized for its hardness and thermal resistance, making it essential in manufacturing abrasives, refractories, and ceramics.
- Import Regulations: Importers of silicon carbide must comply with chemical safety and environmental regulations enforced by agencies such as the EPA and OSHA.
- Duty Rates: Duty rates for HTS 2951 items vary depending on product form and origin. US trade agreements may affect applicable tariffs.
- Product Purity: Some sub-classifications differentiate between crude and high-purity silicon carbide used in electronic applications.
Declaration Example
Product: A shipment of crude silicon carbide powder for industrial abrasive use.US HTS Code:
2951.00.0000(Silicon carbide, crude or artificial)Unit of Quantity: Kilogram (kg)
General Duty Rate: Check current USHTS (may vary with country of origin)
Additional Requirements: Compliance with chemical import regulations and safety data sheets (SDS).
Related HTS Codes
- HTS 2818: Inorganic silicon compounds other than carbides.
- HTS 2846: Carbides, nitrides, borides, and silicides of metals other than silicon.
- HTS 6804: Articles of natural or artificial abrasives.
- HTS 8541: Semiconductor devices and electronic integrated circuits.
