2818.10—Artificial corundum, whether or not chemically definedGeneral duty rate
Free – 1.3%
Across 3 10-digit lines; pick a line below for the exact rate
Coverage on this page
Up one level:
HTS 2818.10 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Artificial corundum, whether or not chemically defined. It sits in Chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes, Section VI: Products of the Chemical or Allied Industries and rolls up 3 10-digit statistical lines, with general duty rates ranging from Free to 1.3%. 3 potentially relevant AD/CVD order flags link to at least one child line.
Pick a line to view its exact rate and estimate duties and customs fees
HTS-linked orders for one or more lines under 2818.10; written scope controls whether a product is covered
HTS 2818.10 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Artificial corundum, whether or not chemically defined. It belongs to Chapter 28 and rolls up 3 10-digit statistical lines that brokers actually file at entry.
General (Column 1) duty rates for the 10-digit lines under HTS 2818.10 range from Free to 1.3%. The exact rate depends on the specific 10-digit statistical line — pick a line below to see its full rate detail.
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader subheading HTS 2818.10 is not directly fileable. Match your product description to the most specific 10-digit line in the list on this page; if multiple lines could apply, the General Rules of Interpretation (GRIs) and chapter notes determine which one governs.
Tandom links 3 potentially relevant AD/CVD order flags to at least one 10-digit line under HTS 2818.10. An HTS link is a screening aid; whether a shipment is covered depends on the order's written product scope and country of origin. Use the linked lookup to review the case materials.
Tandom guides relevant to this code
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
Open resource
Cash deposit cascade, separate rates, all-others, and PRC-wide rates. Worked example on case A-570-910 (galvanized welded steel pipe from China) with three exporter-specific rates.
Open resource
Scope text is authoritative; the HTS list is illustrative. Read scope, find past rulings, and file a 19 CFR 351.225 inquiry. Worked example on case A-570-106 (wooden cabinets from China).
Open resource
Run thousands of product descriptions through HTS classification, score the confidence, and triage borderline rows. Public search endpoint plus the closed-beta three-layer Classifier.
Open resource
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
Why raw LLM prompts fabricate stat suffixes, why MCP-augmented prompts do not, and the prompt template a broker can hand to Claude or ChatGPT today.
Open resource