耐火混凝土 (高强度)
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 6810110010 | 38.2% | CN | US | Official Doc |
| 3816002050 | 38.0% | CN | US | Official Doc |
| 6902905010 | 35.0% | CN | US | Official Doc |
| 6902901010 | 35.0% | CN | US | Official Doc |
| 3816001000 | 35.0% | CN | US | Official Doc |
| 6810110070 | 38.2% | CN | US | Official Doc |
AI Analysis
🧱 High-Strength Refractory Concrete (Industrial Heat-Resistant Composite)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is "High-Strength Refractory Concrete"?
High-strength refractory concrete is a specialized construction material designed to withstand extreme temperatures, chemical erosion, and mechanical stress. Unlike ordinary Portland cement concrete, it utilizes refractory aggregates (such as bauxite, silica, or corundum) and high-alumina cement or specialized binders.
In international trade, it is typically categorized based on its composition and form: 1. Refractory Castables/Monolithics: Ready-to-use mixtures for pouring into molds (e.g., kiln linings). 2. Refractory Blocks/Bricks: Prefabricated shapes. 3. Chemical Preparations: Specific refractory additives or coatings.
⚠️ Key Distinction Point:
- If the product is primarily concrete-like (cementitious, poured or cast) → Likely falls under Chapter 68 (Mineral Products) or Chapter 69 (Ceramics).
- If the product is a specialized chemical preparation with refractory properties not matching specific ceramic definitions → Likely falls under Chapter 38 (Miscellaneous Chemical Products).
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Cross-Reference)
Based on the provided <DATA>, here are the 5 specific HS Codes applicable to High-Strength Refractory Concrete, along with their rationale and tax implications.
| HS Code | Product Description & Rationale | Tax Rate (China Origin → US) |
|---|---|---|
6810.11.00.10 |
Concrete/Man-Made Stone Products - Building Blocks/Bricks Rationale: Material is concrete/man-made stone; form is building block/brick class. This is the most direct classification for refractory concrete blocks. |
38.2% |
6810.11.00.70 |
Concrete - Other Building Blocks/Bricks Rationale: Material is concrete; form is other building block/brick category (non-standard sizes or specific refractory shapes not covered in .10). |
38.2% |
3816.00.20.50 |
Refractory Preparations (Chemical) Rationale: Refractory characteristics fully comply with concrete and similar products. Classified as a chemical preparation due to its specialized refractory nature rather than standard construction. |
38.0% |
3816.00.10.00 |
Refractory Preparations (Chemical) Rationale: Complies with concrete-like material but purpose is strictly refractory. Fits the logic of "other refractory preparations" under Chapter 38. |
35.0% |
6902.90.50.10 |
Refractory Ceramic Blocks/Bricks - Other Rationale: Refractory attributes match refractory building products; contains clay/siliceous earth components. If the binder is more ceramic-like (high clay content), it shifts to Chapter 69. |
35.0% |
6902.90.10.10 |
Refractory Ceramic Blocks/Bricks - Other Rationale: Belongs to refractory materials category; fits logic of other refractory building products under Chapter 69. |
35.0% |
🔍 Critical Insight:
- HS Codes 6810.xx (Concrete-based) generally have a higher base tariff (3.2%) compared to Chapter 69/38.
- HS Codes 6902.xx & 3816.xx (Ceramic/Chemical-based) have 0% base tariff, leading to a lower total tax rate.
- Selection depends on the actual binder: If it’s cement-based → 6810. If it’s clay/ceramic-based → 6902. If it’s a specialized chemical mix → 3816.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: November 10, 2025 onwards (for subsequent imports)
🎯 1. 6810.11.00.10 & 6810.11.00.70 —— Refractory Concrete Blocks/Bricks
| Item | Content |
|---|---|
| Base Tariff | 3.2% (Ad Valorem) |
| USITC Surtax (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Tax Rate | 38.2% |
| Calculation | CIF Value × 38.2% |
| De Minimis Eligibility | ❌ No (deny_de_minimis) |
| Legal Path | USITC:6810.11.00.10 → FOOTNOTE:301.88.01 → IEEPA:9903.01.25 |
📌 Explanation:
- The 3.2% base tariff applies to concrete building products.
- 25% Section 301 tariff is applied due to China origin.
- 10% IEEPA surcharge applies to specific mineral/concrete products from China.
- Total: 38.2%. This is a high-cost category.
🎯 2. 3816.00.20.50 & 3816.00.10.00 —— Refractory Chemical Preparations
| Item | Content |
|---|---|
| Base Tariff | 0.0% - 3.0% |
| USITC Surtax (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Tax Rate | 35.0% - 38.0% |
| Calculation | CIF Value × (0%–3%) + 35% |
| De Minimis Eligibility | ❌ No |
| Legal Path | USITC:3816.00.xx → FOOTNOTE:301.88.01 → IEEPA:9903.01.25 |
📌 Explanation:
-3816.00.10.00has a 0% base tariff, resulting in a 35.0% total.
-3816.00.20.50has a 3.0% base tariff, resulting in a 38.0% total.
- These are often preferred if the product can be legally defined as a "chemical preparation" rather than a "construction material," as they may have slightly lower base rates.
🎯 3. 6902.90.50.10 & 6902.90.10.10 —— Refractory Ceramic Blocks
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| USITC Surtax (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Tax Rate | 35.0% |
| Calculation | CIF Value × 35.0% |
| De Minimis Eligibility | ❌ No |
| Legal Path | USITC:6902.90.xx → FOOTNOTE:301.88.01 → IEEPA:9903.01.25 |
📌 Explanation:
- 0% base tariff makes this the most tax-efficient option if the product qualifies as a "refractory ceramic" (e.g., high clay/silica content).
- Total: 35.0%. This is 3.2% cheaper than concrete-based HS codes.
🛠️ IV. Customs Clearance Practical Advice (Risk Avoidance Guide)
✅ 1. Documentation Checklist (Essential)
| Document | Mandatory? | Explanation |
|---|---|---|
| ✅ Technical Data Sheet | ✔️ | Must specify composition (e.g., % Alumina, % Silica, Binder Type). Critical for distinguishing between 6810 (cement) and 6902 (ceramic). |
| ✅ Product Photos | ✔️ | Show shape (block vs. pourable), color, and texture. |
| ✅ Certificate of Origin (CO) | ✔️ | To confirm China origin and apply correct surtaxes. |
| ✅ Commercial Invoice | ✔️ | Clearly state "Refractory Concrete" or "Refractory Castable". Avoid vague terms like "Building Material." |
| ✅ HS Code Pre-Ruling | ✔️ | Highly Recommended to confirm between 6810, 6902, or 3816. |
| ✅ Third-Party Test Report | ✔️ | ISO/ASTM tests for refractoriness (Pyrometric Cone Equivalent) and compressive strength. |
✅ 2. Declaration Tips (Key Mantras)
🔥 “Cement is 6810, Clay is 6902, Chemical is 3816. Be precise, pay less!”
| Scenario | Correct Declaration | Incorrect Declaration | Consequence |
|---|---|---|---|
| High-Alumina Cement Mix | 6810.11.00.10 |
6902.90.50.10 |
Overpayment: 38.2% vs 35.0%. Customs may audit and demand difference. |
| Clay-Based Refractory Brick | 6902.90.50.10 |
6810.11.00.10 |
Underpayment: 35.0% vs 38.2%. Risk of penalty + back duty. |
| Specialized Chemical Coating | 3816.00.10.00 |
6810.11.00.70 |
Risk: If deemed "concrete," 3.2% base tax applies. If deemed "chemical," 0%. |
| Generic "Refractory Material" | ❌ Never | Use generic term | Delay/Seizure: Customs will reclassify based on composition, likely to highest base rate. |
✅ 3. Special Considerations
| Situation | Advice |
|---|---|
| OEM Custom Shapes | Provide design drawings. If non-standard, use 6810.11.00.70 (Other) rather than .10. |
| High-Strength (>50 MPa) | Emphasize "High-Strength" in description, but composition matters more than strength for HS classification. |
| Pre-mixed vs. On-site Mix | Pre-mixed bags are easier to classify. On-site mixes may require additional documentation for "chemical preparation" status. |
| Packaging | If imported in pallets with loose bricks, ensure packaging is declared separately or included in CIF value. |
🌍 V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Total Tariff (China Origin) | Notes |
|---|---|---|---|
| 🇺🇸 United States | 6902.90.50.10 or 3816.00.10.00 |
35.0% | Avoid 6810 if possible (38.2%). |
| 🇨🇳 China | 6810.11.00.10 |
~0% (Export) | No export duty on most refractories. |
| 🇪🇺 European Union | 6902.90.50.10 |
0% - 4.5% | CE Marking required. No Section 301 equivalent. |
| 🇮🇳 India | 6810.11.00.00 |
~10% | BCD + SAD. Check anti-dumping duties. |
| 🇦🇺 Australia | 6902.90.50.10 |
5% | No Section 301 equivalent. |
📌 Conclusion:
- USA is the most costly market due to 35-38.2% total tariffs.
- Optimization Strategy: If the product contains clay or silica-based binders, classify under 6902.90.50.10 (35.0%) instead of 6810 (38.2%). This saves 3.2% on CIF value.
📌 VI. Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Calling it "Refractory Concrete" when it’s actually "Refractory Brick."
👉 Consequence: HS Code confusion. "Concrete" implies 6810, "Brick" implies 6902. Misclassification leads to duty audits.
❌ Mistake 2: Ignoring the Binder Type.
👉 Consequence: Using cement-based HS code for a clay-based product. Underpayment of duty → Penalty + Interest.
❌ Mistake 3: Not declaring Section 122 (IEEPA) Surcharge.
👉 Consequence: Incorrect total tax calculation. The 10% surcharge is mandatory for many mineral products from China.
❌ Mistake 4: Assuming "De Minimis" applies.
👉 Consequence: Refractory concrete is NOT eligible for de minimis (under $800). All shipments are subject to full duty.
✅ Correct Practice:
"High-Strength Refractory Castable, Alumina-Based, Pre-mixed, for Kiln Lining, Model RC-50, ASTM C33 Standards, Made in China"
🎯 VII. Conclusion: Precision in Classification Saves Money
🎯 Key Takeaways:
🔹 "Cement = 38.2%, Clay/Chem = 35.0%. Small difference, big impact!"
🔹 "No De Minimis. Every shipment is taxed."
🔹 "Specify Composition. Don’t just say 'Refractory'."
📌 Pro Tip:
If your product can be legally defined as a clay-based ceramic (6902) or chemical preparation (3816), choose these HS codes to save 3.2% - 3.0% on tariffs.
Always request an HS Code Pre-Ruling from CBP before shipping large volumes.
📣 Immediate Action:
📞 Consult with a licensed customs broker.
📄 Provide detailed Material Safety Data Sheet (MSDS) and Composition Analysis.
🚀 Clear your goods efficiently, avoid penalties, and protect your margins!
✨ Professional Clearance Starts with Accurate Classification!
💼 Your every dollar of cost deserves precise calculation!
Customer Reviews
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.