HS Code for Carbon paste

Carbon paste is classified under HS code 3801.30. This code is situated within Chapter 38, which covers miscellaneous chemical products. Specifically, 3801.30 is designated for carbonaceous pastes used for electrodes and similar pastes used for furnace linings. The classification is based on the chemical composition and the industrial application of the material. Carbon paste is typically a mixture of carbonaceous aggregates—such as calcined petroleum coke, anthracite, or graphite—and a binder, usually coal tar pitch or a synthetic resin. Because it is a prepared mixture intended for a specific industrial process (forming electrodes in situ or lining high-temperature vessels), it is classified as a chemical preparation rather than a simple mineral or a finished article. The Söderberg electrode process is a primary consumer of this material, where the paste is baked into a solid electrode during the operation of the furnace.

Products Included

• Söderberg electrode paste
• Carbonaceous ramming mass
• Cold ramming paste for furnace bottoms
• Carbon-based jointing pastes for refractory bricks
• Electrode coating compounds

Common Misclassification

Carbon paste is frequently confused with HS code 3801.10, which covers artificial graphite in primary forms like powder or flakes. While carbon paste contains these materials, the addition of a binder changes its classification to 3801.30. It may also be misclassified under 3214.10 (glaziers' putty and other mastics) or 3816.00 (refractory cements and mortars). However, 3801.30 is a more specific heading for carbon-based pastes used specifically for electrodes and furnace linings. If the paste is intended for general sealing or construction without a primary carbonaceous/conductive requirement, 3816.00 might be considered, but for industrial smelting and electrode applications, 3801.30 is the correct choice.

FAQ

What is the HS code for carbon paste?

The HS code for carbonaceous pastes used for electrodes and furnace linings is 3801.30.

What is the difference between carbon paste and refractory mortar?

Carbon paste (3801.30) is specifically formulated with a high carbon content and binders for electrode or furnace lining use, whereas refractory mortar (3816.00) is generally ceramic-based and used for bonding refractory bricks.