refractory concrete accelerator
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3816002050 | 38.0% | CN | US | Official Doc |
| 3816001000 | 35.0% | CN | US | Official Doc |
| 6810110010 | 38.2% | CN | US | Official Doc |
| 6902905010 | 35.0% | CN | US | Official Doc |
| 6902901010 | 35.0% | CN | US | Official Doc |
Product Images
AI Analysis
🧱 Refractory Concrete Accelerator (Refractory Castable Additives)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy
📌 Part I: Product Definition & Classification: What Exactly Is "Refractory Concrete"?
Refractory Concrete, often referred to in industrial contexts as Refractory Castables or Monolithic Refractories, is a dry mixture of refractory aggregates and powders with appropriate binders and additives (such as accelerators or retarders). It is used for lining furnaces, kilns, and other high-temperature equipment.
In international trade, the classification depends heavily on: 1. Base Material: Is it primarily cementitious (concrete-like) or ceramic/clay-based? 2. Form: Is it in blocks/bricks or loose powder for pouring? 3. Chemical Composition: Does it fall under chemical products or construction materials?
⚠️ Key Distinction Point:
- If the product is primarily cement-based or similar binding agents used for construction blocks → Falls under Chapter 68 (Articles of Stone, Plaster, Cement...).
- If the product is specifically engineered for high-temperature resistance (refractory properties) regardless of base material → Falls under Chapter 38 (Miscellaneous Chemical Products) or Chapter 69 (Ceramic Products).
📦 Part II: HS Code Classification Details (2026 Latest Tariff Authority Comparison)
The following codes are derived directly from the provided data set for "Refractory Concrete" and related items.
| HS Code | Product Description (Based on Data) | Applicable Scenario | Key Characteristics |
|---|---|---|---|
6810.11.00.10 |
Refractory concrete classified as concrete/artificial stone articles; Form: Building blocks/bricks. | Prefabricated refractory bricks, blocks. | ❌ Not liquid/powder accelerator; solid block form. |
3816.00.20.50 |
Refractory concrete with refractory properties; Material: Concrete and similar products. | General refractory additives, castables, accelerators where chemical nature dominates. | ✅ Highly Likely for "Accelerator" if classified as chemical additive. |
6902.90.50.10 |
Refractory concrete as refractory building articles; Material: Inorganic materials like clay/siliceous earth. | Clay-based or high-alumina ceramic refractories poured or formed. | ⚠️ Specific inorganic material requirement. |
6902.90.10.10 |
Refractory concrete under refractory materials category; Fits "other refractory building articles." | General refractory lining materials not specified elsewhere. | ⚠️ Broader ceramic category. |
3816.00.10.00 |
Refractory concrete material matches concrete and similar products; Use: Refractory scope. | Chemical additives (accelerators) used in concrete that impart refractory properties. | ✅ Strong Candidate for "Accelerator" if sold as a chemical agent. |
6810.11.00.70 |
Refractory concrete material is concrete; Form: Building masonry blocks; Category: Other. | Other cement-based refractory blocks/pavers. | ❌ Solid form, not primarily for chemical reaction acceleration. |
🔍 Critical Analysis for "Accelerator": - An Accelerator is typically a chemical additive (powder or liquid) added to refractory castables to speed up setting/hardening. - If classified by its chemical function (admixtures for refractory concrete), it often falls under HS 3816 (Preparations of a kind used as additives or as independent products for cements, plasters or concretes; refractory cements, concretes and similar compositions). - If classified by its physical form as a finished building product (e.g., if sold as pre-mixed blocks), it falls under 6810 or 6902. - Recommendation: For a pure "Refractory Concrete Accelerator" (chemical additive),
3816.00.10.00or3816.00.20.50are the most technically accurate, as they capture the "refractory property" and "chemical/concrete additive" nature.
💰 Part III: 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Additions)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Time: 2025/2026 (Current Trade Policies)
🎯 1. For HS Codes under Chapter 38 (3816.00.10.00 / 3816.00.20.50)
These codes relate to chemical additives and refractory preparations.
| Item | Content |
|---|---|
| Base Tariff | 0.0% - 3.0% (Ad valorem) |
| Section 301 Surcharge | +25.0% (Standard USITC Section 301 duties on Chinese goods) |
| Section 122 Clause Tariff | +10.0% (Specific duty applicable to certain Chinese imports) |
| Total Effective Rate | 35.0% - 38.0% |
| Tax Calculation | CIF Value × (Base Rate + 25% + 10%) |
| De Minimis Exemption | ❌ NOT Applicable (Section 301 and IEEPA duties generally deny de minimis) |
| Legal Basis Path | USITC:3816.00 → Section 301: Footnote 9903.88.01 → Section 122: Specific Provisions |
📌 Explanation:
- The 25% is the standard Section 301 tariff on most Chinese industrial goods. - The 10% is attributed to specific "Section 122" clauses mentioned in the data (note: Section 122 is typically used for national security restrictions on steel/aluminum, but data specifies it applies here; follow data constraint). -3816.00.10.00and3816.00.20.50have a 35.0% - 38.0% effective burden.
🎯 2. For HS Codes under Chapter 68 (6810.11.00.10 / 6810.11.00.70)
These codes relate to cement/concrete articles (blocks/bricks).
| Item | Content |
|---|---|
| Base Tariff | 3.2% (Ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Clause Tariff | +10.0% |
| Total Effective Rate | 38.2% |
| Tax Calculation | CIF Value × 38.2% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Basis Path | USITC:6810.11 → Section 301 → Section 122 |
📌 Explanation:
- Slightly higher base rate (3.2%) compared to Chapter 38 codes. - Total burden is 38.2%.
🎯 3. For HS Codes under Chapter 69 (6902.90.50.10 / 6902.90.10.10)
These codes relate to ceramic refractory products.
| Item | Content |
|---|---|
| Base Tariff | 0.0% (Ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Clause Tariff | +10.0% |
| Total Effective Rate | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption | ❌ Not Applicable |
| Legal Basis Path | USITC:6902.90 → Section 301 → Section 122 |
📌 Explanation:
- Lowest base rate (0.0%), but still subject to high surcharges. - Total burden is 35.0%.
🛠️ Part IV: Customs Clearance Practical Advice (Real-World Pitfall Guide)
✅ 1. Documentation Checklist (Essential for Smooth Clearance)
| Document | Mandatory? | Explanation |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must detail chemical composition, refractory temperature limits, and setting time reduction % (for accelerators). |
| ✅ Material Safety Data Sheet (MSDS) | ✔️ | Critical for chemical additives. Shows if it is hazardous. |
| ✅ Commercial Invoice | ✔️ | Clearly state: "Refractory Concrete Accelerator, Chemical Additive for Castables, HS Code 3816.00.10.00". Avoid vague terms like "Building Material". |
| ✅ Packing List | ✔️ | Detail net/gross weight. If packaged in drums/bags, specify unit weight. |
| ✅ Certificate of Origin (CO) | ✔️ | Proof of Chinese origin triggers the 25% + 10% tariffs. |
| ✅ Label Photos | ✔️ | Labels must show ingredient composition to prove it falls under "chemical additives" rather than "ceramics" or "pre-mixed concrete". |
✅ 2. Declaration Strategy (Key Mnemonics)
🔥 "Chemical Function First, Form Second; Name Precise, Tax Clear!"
| Scenario | Correct Declaration | Wrong Action |
|---|---|---|
| Pure Accelerator (Powder/Liquid) | Use 3816.00.10.00 or 3816.00.20.50. Describe as "Chemical Admixture for Refractory Concrete". |
Describe as "Refractory Brick" → Wrong chapter, potential penalty. |
| Pre-mixed Refractory Castable | Use 3816.00.20.50 (if chemical mix) or 6810.69.90 (if concrete-like). |
Describe as "Cement" → Lower tariff risk, but misclassification. |
| Refractory Bricks/Blocs | Use 6810.11.00.10 or 6902.90.50.10. |
Describe as "Chemical Powder" → Physical mismatch, customs rejection. |
| Clay-based Refractories | Use 6902.90.10.10. |
Use Chapter 38 if it's clearly ceramic clay → Misclassification. |
✅ 3. Special Handling
| Situation | Advice |
|---|---|
| OEM / Private Label | Ensure the invoice lists the generic name "Refractory Concrete Accelerator" rather than just a brand name, to help customs identify the HS code. |
| Mixed Containers | If shipping accelerators with refractory bricks, declare separately. Do not lump them under one HS code. |
| Hazardous Nature | If the accelerator contains alkali metals or strong bases, it may be HAZMAT. Prepare IMDG/ERG data for shipping. |
🌍 Part V: Global Market Comparison (2026 Context)
| Country/Region | Recommended HS Code | Estimated Total Duty (China Origin) | Notes |
|---|---|---|---|
| 🇺🇸 USA | 3816.00.10.00 / 6902.90.50.10 |
35.0% - 38.2% | High Section 301 + Section 122 tariffs. |
| 🇨🇳 China | 3824.99 or 6810.11 |
~0% - 3% | Low import tariffs for raw materials/chemicals. |
| 🇪🇺 EU | 3824.99 (Chemical additives) |
~4.0% - 6.0% | No Section 301 equivalent, but VAT applies. |
| 🇮🇳 India | 3824.99 |
~7.5% - 12% | Higher base rates, fewer surcharges than US. |
📌 Conclusion:
- The USA market is the most expensive due to layered tariffs (Base + 25% + 10%). - Chapter 38 (3816) is generally preferred for chemical accelerators to avoid "construction material" scrutiny, but rates are similar to Chapter 68 in this specific data set. - Chapter 69 (6902) offers the lowest base rate (0%) but is strictly for ceramic/clay-based refractories.
📌 Part VI: Common Errors & Pitfalls (Blood & Tears Lessons)
❌ Error 1: Declaring "Refractory Concrete Accelerator" as "Cement" (HS 2523)
👉 Consequence: Cement has different tariff structures and regulatory requirements. Misclassification leads to detention and fines.
❌ Error 2: Ignoring the Section 122 10% surcharge
👉 Consequence: Underestimating landed cost by 10%. This clause is non-negotiable for these codes in the provided data.
❌ Error 3: Using "Building Blocks" description for a Powder Accelerator
👉 Consequence: Customs will reject the declaration as it doesn't match the physical form (powder vs. block).
❌ Error 4: Not specifying Refractory Properties in the description
👉 Consequence: Customs may classify it as a general chemical (3824) or general concrete additive (3824.99), leading to audits or incorrect tariff application.
✅ Correct Declaration Example:
"Refractory Concrete Accelerator, Powder Form, Chemical Admixture to Reduce Setting Time for High-Temperature Castables, HS Code 3816.00.10.00, Made in China."
🎯 Part VII: Conclusion: Professional Declaration Saves Money!
🎯 Remember the Rules:
🔹 "Accelerator = Chemical (3816)" or "Castable Block = Concrete/Ceramic (6810/6902)".
🔹 "US Import = Base + 25% + 10% = 35-38% Cost."
🔹 "Detail Matters: Name, Form, and Chemical Nature must align."
📌 Pro Tip:
If you are importing large volumes, consider Advance Ruling (Ruling Letter) from CBP (US Customs) to lock in the HS Code interpretation for 3816.00.10.00 vs 3816.00.20.50. This prevents future disputes and ensures the 35.0%-38.2% rate is confirmed and not upgraded by a customs officer's discretion.
📣 Immediate Action:
📞 Contact your freight forwarder with the MSDS and Technical Data Sheet.
🚀 Declare accurately to avoid 100% duty penalties and shipment delays.
✨ Professional Clearance Starts with Precise Classification!
💼 Every percentage point in tariff affects your bottom line!
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.