HS Code for Boron carbide

Boron carbide is classified under HS code 2849.90, which falls within Chapter 28 of the Harmonized System, covering inorganic chemicals. Specifically, heading 2849 is dedicated to carbides, which are chemical compounds consisting of carbon and another element. Boron carbide (B4C) is one of the hardest known materials, valued for its chemical resistance and nuclear properties. While the HS nomenclature provides specific subheadings for calcium carbide (2849.10) and silicon carbide (2849.20), boron carbide is not explicitly named at the six-digit level. Therefore, it is categorized under the residual subheading 2849.90, which encompasses 'other' carbides. This classification applies to the substance whether it is in the form of powder, grains, or unshaped solid masses, provided it is a chemically defined compound. The classification logic follows General Interpretative Rule 1, prioritizing the terms of the headings and the relevant chapter notes which define carbides as binary compounds of carbon.

Products Included

• Technical grade boron carbide powder
• Boron carbide abrasive grains for grinding
• Nuclear grade boron carbide used as a neutron absorber
• Sintered boron carbide in unfinished, unshaped forms
• Boron carbide crystals for industrial applications

Common Misclassification

Boron carbide is frequently confused with silicon carbide, which is classified under 2849.20. While both are used as abrasives, they are chemically distinct. Another common error is classifying finished articles made of boron carbide, such as ceramic armor plates or nozzles, under this code. Finished ceramic articles should be classified in Chapter 69 (e.g., 6903 or 6909). Additionally, mixtures of boron carbide with other binders or materials may be classified under 3824.99 as chemical preparations rather than pure carbides.

FAQ

What is the HS code for boron carbide?

The HS code for boron carbide is 2849.90, which covers carbides other than those of calcium or silicon.

Is boron carbide classified differently if it is used for nuclear shielding?

No, the chemical substance itself remains under 2849.90. However, if it is manufactured into specific reactor components, it may be classified under 8401.40.