Synthetic Graphite Sintered Block
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3801105010 | 35.0% | CN | US | Official Doc |
| 3801105090 | 35.0% | CN | US | Official Doc |
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🧱 Synthetic Graphite Sintered Block (Artificial Graphite)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is a "Sintered Block"?
A Synthetic Graphite Sintered Block is a high-purity, industrial-grade carbon product manufactured through high-temperature heat treatment (graphitization) of artificial carbon precursors. It is not natural graphite, nor is it colloidal or paste-based.
In international trade, this product falls strictly under HS Chapter 38, specifically Heading 3801:
"Artificial graphite; colloidal or semi-colloidal graphite; preparations based on graphite or other carbon in the form of pastes, blocks, plates or other semimanufactures."
⚠️ Key Distinction Point:
- If the product is solid, dense, and shaped (blocks, plates, rods) made from artificial carbon → It belongs to 3801.10.
- If it is powder, paste, or colloidal → It may fall under different subheadings (not covered in ).
- Natural Graphite is excluded from 3801 and belongs to HS 2504. This guide covers ONLY Artificial/Synthetic Graphite.
📦 II. HS Code Classification Details (2026 Official Tariff Reference)
Based on the provided data, synthetic graphite blocks are classified under two specific subheadings depending on their surface modification status.
| HS Code | Product Description | Applicable Scenario | Surface Treatment |
|---|---|---|---|
3801.10.50.10 |
Artificial Graphite: Other Surface-modified spherical graphite | Graphite spheres treated for specific chemical/physical properties (e.g., coated, flaky-to-spherical conversion with surface mods) | ✅ Modified |
3801.10.50.90 |
Artificial Graphite: Other Other | Standard sintered blocks, plates, or semi-manufactures without specific surface modification | ❌ Not Modified |
🔍 Critical Note:
- The term "Sintered Block" generally implies a solid, shaped article.
- If your block is standard synthetic graphite (no special surface coating/modification), it almost certainly falls under3801.10.50.90.
- If the graphite has been surface-modified (e.g., oxidized, coated, or specially treated spherical particles compressed into a block), it may fall under3801.10.50.10.
- Do not confuse with HS 3801.90 (Other) or HS 6815 (Articles of graphite other than electrical). Sintered blocks for industrial use are typically 3801.
💰 III. 2026 Tariff Rate Breakdown (Detailed Tax Clauses)
✅ Applicable Country: USA (US)
✅ Origin: China (CN)
✅ Effective Date: Current rates apply
🎯 1. 3801.10.50.10 — Surface-Modified Spherical Graphite
| Item | Content |
|---|---|
| Basic Duty Rate | 0.0% |
| Additional Duty (Section 301) | +25.0% |
| Total Tax Rate | 25.0% |
| Tax Calculation | CIF Value × 25% |
| Legal Basis | HTSUS 3801.10.50.10 + USITC Footnote 9903.88.01 (Section 301) |
📌 Explanation:
- Although the basic MFN duty is 0%, the 25% additional tariff applies due to Section 301 trade actions against China.
- This rate is mandatory and non-discriminatory based on origin (if from China).
🎯 2. 3801.10.50.90 — Other Artificial Graphite (Standard Sintered Blocks)
| Item | Content |
|---|---|
| Basic Duty Rate | 0.0% |
| Additional Duty (Section 301) | +25.0% |
| Total Tax Rate | 25.0% |
| Tax Calculation | CIF Value × 25% |
| Legal Basis | HTSUS 3801.10.50.90 + USITC Footnote 9903.88.01 (Section 301) |
📌 Explanation:
- Same as above: 0% base + 25% surcharge = 25% total.
- This is the most common classification for standard synthetic graphite sintered blocks used in crucibles, electrodes, or seals.
🛠️ IV. Customs Clearance Practical Advice (Avoid Pitfalls)
✅ 1. Documentation Checklist (Mandatory)
| Document | Required? | Explanation |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must state: "Artificial/Synthetic Graphite," not "Natural Graphite." Include density, purity (>99%), and graphitization temperature. |
| ✅ Material Safety Data Sheet (MSDS) | ✔️ | For hazard classification (usually non-hazardous, but required for air/sea freight). |
| ✅ Certificate of Origin (CO) | ✔️ | To prove origin. If from China, the 25% tariff is unavoidable unless an exemption applies. |
| ✅ Commercial Invoice | ✔️ | Must explicitly describe goods as "Synthetic Graphite Sintered Block" and avoid vague terms like "Carbon Rod" without context. |
| ✅ Packing List | ✔️ | Detail net/gross weight carefully. Graphite is dense; ensure accurate weight declarations. |
✅ 2. Declaration Tips (Key Phrases)
🔥 "Be Precise, Avoid Ambiguity, Pay the Surcharge!"
| Scenario | Correct Declaration | Incorrect Declaration |
|---|---|---|
| Standard Block | 3801.10.50.90 - "Artificial graphite sintered block, non-modified" |
"Graphite Block" (Too vague, may trigger manual review) |
| Surface-Treated | 3801.10.50.10 - "Surface-modified spherical artificial graphite" |
"Modified Graphite" (Must specify "spherical" if using 10) |
| Natural Graphite | HS 2504 (NOT 3801) | Declaring natural as synthetic → Fraud risk! |
⚠️ Warning:
- Natural Graphite (HS 2504) has a 0% base rate and often exemptions from Section 301.
- Artificial Graphite (HS 3801) has a 25% surcharge.
- Misclassification is a major risk: If you declare natural graphite but the lab tests show synthetic, you face penalties + back-taxes.
✅ 3. Special Circumstances
| Situation | Handling Advice |
|---|---|
| OEM/Custom Shapes | Provide engineering drawings. Shape does not change HS code if material is synthetic graphite. |
| Graphite Electrodes | Often classified under 8545 (Graphite electrodes). Check if your "block" is specifically for electrical use. If so, HS 8545 may apply (different tariffs). |
| Small Samples | De Minimis rules may apply for low-value shipments, but Section 301 taxes are NOT exempt under de minimis for China-origin goods in many cases. Verify with broker. |
🌍 V. Global Market Comparison (2026 Snapshot)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Notes |
|---|---|---|---|
| 🇺🇸 USA | 3801.10.50.90 |
25% | Includes 25% Section 301 surcharge |
| 🇨🇳 China | 3801.10.50 |
0% | No import tariffs on graphite blocks |
| 🇪🇺 EU | 3801.10.00 |
0% | No surcharges for China-origin graphite |
| 🇮🇳 India | 3801.10.10 |
Varies (Check CBIC) | Often higher duties; consult local customs |
| 🇻🇳 Vietnam | 3801.10.00 |
0% - 5% | Potential for lower rates if processed locally |
📌 Conclusion:
- USA is the only major market with a significant 25% tariff on synthetic graphite from China.
- If exporting to the US, cost planning must include the 25% duty.
- Consider sourcing or processing in non-China countries (e.g., Vietnam, Thailand) if tariffs are prohibitive, but verify rules of origin to avoid transshipment penalties.
📌 VI. Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Declaring "Graphite" without specifying "Artificial" vs. "Natural"
👉 Consequence: Customs lab test required. Delay of 2-4 weeks. If found to be synthetic, 25% duty applied retroactively.
❌ Mistake 2: Using HS 6815 (Articles of graphite) for sintered blocks
👉 Consequence: HS 3801 is more specific for "preparations/semimanufactures." Misclassification leads to 25% duty under 6815 or rejection.
❌ Mistake 3: Ignoring the "Surface-Modified" distinction
👉 Consequence: If your product is modified but declared as "Other Other," you may underpay or overpay duties. Ensure accurate classification.
✅ Correct Practice:
"Artificial Graphite Sintered Block, 99.9% Purity, Non-Electrode Use, Origin: China"
HS Code: 3801.10.50.90
🎯 VII. Conclusion: Precision in Classification Saves Money!
🎯 Remember the Golden Rule:
🔹 "Synthetic = 3801 + 25% (USA)"
🔹 "Natural = 2504 + 0% (Often)"
🔹 "Don't Guess, Test, and Declare!"
📌 Pro Tip:
If your graphite blocks are used for electrodes (not general industrial), check HS 8545.19 or 8545.20, which may have different tariff treatments. For standard sintered blocks (crucibles, seals, etc.), stick to 3801.10.
📣 Immediate Action:
📞 Contact your customs broker with a material test report to confirm "Artificial" vs. "Natural."
🚀 Include 25% duty in your CIF pricing for US shipments to avoid profit erosion.
✨ Professional clearance starts with precise classification!
💼 Your bottom line depends on the first 4 digits of your HS Code!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.