石墨烧结块

🔥 Graphite Sintered Blocks (Sintered Graphite)

🌐 HS Code Reference & Clearance Guide | 2026 Latest Tariff Rules | Professional Customs Strategy
📌 Section 1: Product Definition & Classification: Do You Truly Understand "Sintered Graphite"?

Graphite sintered blocks are carbon-based composite materials produced by compressing and heating graphite powder at high temperatures (without melting). They are widely used in electrolysis, high-temperature furnaces, nuclear reactors, and semiconductor manufacturing.

In international trade, their classification depends on origin (natural vs. synthetic), form (block vs. powder), and application (electrical vs. non-electrical). Misclassification can lead to 35% total tariff (or higher with additional duties), making precise HS code selection critical.

⚠️ Key Classification Triggers:
- Natural Graphite (Raw) → 2504.90.00.00 / 2504.10.50.00
- Synthetic Graphite (Manufactured) → 3801.10.50.90 / 3801.10.50.10
- Non-Electrical Carbon Products → 6815.19.00.00 / 6815.99.41.10

📦 Section 2: HS Code Classification Details (2026 Latest Tariff Rules)

🔍 Critical Reminder:
- Natural graphite (mined) always falls under Chapter 25; Synthetic graphite (manufactured) under Chapter 38.
- If the block is used in electrical applications, it might be misclassified; check if it qualifies for electrical carbon codes instead.
- "Non-electrical" blocks (e.g., structural supports) fall under Chapter 68, not Chapter 25/38.

💰 Section 3: 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)

✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Date: November 10, 2025 onwards (including subsequent imports)

🎯 1. 2504.90.00.00 — Natural Graphite Blocks ("Other" Category)

📌 Explanation:
- 25% USITC surcharge applies under "Section 301" of U.S. Trade Act for Chinese-origin graphite;
- 10% IEEPA surcharge is the new对华 (China-specific) tariff for critical minerals;
- Total 35% is extremely high for raw materials; must be budgeted in advance!

🎯 2. 2504.10.50.00 — Natural Graphite (Flake/Granule Form)

📌 Note:
- Same tariff as natural graphite blocks;
- Applies to natural graphite compressed into flakes/granules, even if processed.

🎯 3. 3801.10.50.90 — Synthetic Graphite (No Surface Modification)

📌 Explanation:
- Synthetic graphite is man-made, but still subject to 35% total tariff under Section 301;
- No surface modification means it's considered "basic industrial grade";
- High-carbon synthetic graphite (e.g., for batteries) may qualify for different codes!

🎯 4. 3801.10.50.10 — Synthetic Graphite (Primary Shape, Catch-All)

📌 Note:
- "Catch-all" category for basic synthetic graphite blocks;
- If your product is custom-engineered (e.g., for aerospace), consider 6815 codes instead!

🎯 5. 6815.19.00.00 — Carbon Products, Non-Electrical Graphite Blocks

📌 Explanation:
- For non-conductive graphite blocks (e.g., structural parts, seals);
- Still subject to 35% total tariff;
- Must prove non-electrical use to avoid misclassification as Chapter 25/38!

🎯 6. 6815.99.41.10 — Mineral Products, Graphite Blocks with 0–30% Carbon Content

📌 Note:
- For mineral composites with low graphite content (0–30%);
- Not pure graphite; still subject to 35% total tariff;
- Requires third-party carbon content test to verify classification!

🛠️ Section 4: Customs Clearance Practical Advice (Real-World Pitfall Avoidance)

✅ 1. Document Checklist (Must-Haves)

✅ 2. Declaration Tips (Key Mnemonics)

🔥 "Natural vs. Synthetic, Electrical vs. Non-Electrical, Name Matters!"

✅ 3. Special Cases Handling

🌍 Section 5: Global Market Clearance Comparison (2026 Latest)

📌 Conclusion:
- USA is the only market charging 35% total tariff for Chinese-origin graphite blocks;
- Consider re-export via Vietnam/Mexico/Thailand to avoid IEEPA surcharges (if applicable);
- Apply for Advance Ruling before shipping to prevent delays.

📌 Section 6: Common Mistakes & Pitfall Avoidance (Lessons Learned)

❌ Mistake 1: Reporting natural graphite as synthetic (or vice versa)
👉 Consequence: 35% tariff + delay + possible penalty

❌ Mistake 2: Failing to prove "non-electrical" use for 6815 codes
👉 Consequence: Re-classified to 2504/3801 → 35% tariff

❌ Mistake 3: Not providing carbon content test for 6815.99.41.10
👉 Consequence: Delayed clearance + additional testing fees

✅ Correct Approach:

"Graphite Sintered Block, Natural Origin, 99% C, 20x20x10cm, For Non-Electrical Industrial Furnace, CO: CN, Carbon Test Report Attached"

🎯 Section 7: Conclusion: Precise Classification, Smooth Clearance, Cost Efficiency!

🎯 Remember:

🔹 "Natural ≠ Synthetic, Electrical ≠ Non-Electrical, Name = Tax"
🔹 "35% total tariff is the norm for China-origin graphite blocks"

📌 Pro Tip:

If your graphite blocks are sourced from Vietnam, Mexico, or Thailand, you may qualify for IEEPA exemption (0–5% tariff);
Apply for Advance Ruling before shipping to minimize risks!

📣 Act Now:

📞 Contact professional customs brokers + provide product specs + apply for HS Code Advance Ruling
🚀 Ensure your graphite blocks clear customs smoothly, minimize costs, and maximize profit!

✨ Professional Clearance Starts with Accurate Classification!
💼 Every dollar saved on tariffs counts!