Tires
Choosing carbon black for tires means choosing a structural component, not a filler. Tread…
N326 Carbon Black Hard grade Origin: Iran
N326 Carbon Black
N326 carbon black is a low-structure, low-modulus hard grade with high elongation at break. For compounds that need flexibility and tensile strength together.
- HS Code
- 2803.00
- Minimum order
- 1 pallet
- Delivery terms
- EXW · FOB · CFR · CIF · DDP
N326 carbon black is the lowest-structure member of the hard grade family. Its high pour density (455 kg/m³) and low OAN value set it apart from the other hard grades.
Why low structure is wanted
Not every application needs high modulus. In parts that flex, bend and fatigue continuously, high modulus accelerates crack initiation. The low structure of N326, combined with high elongation at break and excellent tensile strength, gives an ideal profile for off-the-road tire treads and carcass plies.
Applications
Mechanical rubber goods, tire carcass plies, belts and hoses, off-the-road tire treads.
Technical Specifications
| # | Property | Value | Unit |
|---|---|---|---|
| 01 | Iodine adsorption number ASTM D1510 | 82 ± 5 | g/kg |
| 02 | Oil absorption number (OAN) ASTM D2414 | 72 ± 5 | ml/100 g |
| 03 | Compressed oil absorption number (COAN) ASTM D3493 | 68 ± 5 | ml/100 g |
| 04 | Pour density ASTM D1513 | 455 ± 20 | kg/m³ |
| 05 | Heating loss (max) ASTM D1509 | 1 | % |
| 06 | Toluene discoloration (min) ASTM D1618 | 85 | % |
| 07 | pH ASTM D1512 | 7.5 – 9 | |
| 08 | Fines content — Q-Bag (max) ASTM D1508 | 7 | % |
| 09 | Fines content — bag (max) ASTM D1508 | 10 | % |
| 10 | Individual pellet hardness — single max (20 pellets) ASTM D5230 | 50 | cN |
| 11 | Individual pellet hardness — average (20 pellets) ASTM D5230 | 10 – 40 | cN |
| 12 | Sieve residue — No. 35 US Std (max) ASTM D1514 | 10 | ppm |
| 13 | Sieve residue — No. 325 US Std (max) ASTM D1514 | 1,000 | ppm |
| 14 | Ash content (max) ASTM D1506 | 0.75 | % |
| 15 | Sulfur content (max) ASTM D1619 | 2 | % |
| 16 | Nitrogen surface area (NSA) ASTM D6556 | 78 ± 5 | m²/g |
| 17 | External surface area (STSA) ASTM D6556 | 76 ± 5 | m²/g |
| 18 | Tint strength ASTM D3256 | 111 ± 5 | % |
| 19 | Particle size | 26 – 30 | nm |
Values are manufacturer specifications; ± indicates the production tolerance. Every shipment is sent with a certificate of analysis (CoA) for that batch from an ISO/IEC 17025 accredited laboratory.
Packaging and Loading
| Packaging Type | Net Weight | Per Pallet | Container / Truck |
|---|---|---|---|
| Jumbo bag (PP-PE, double valve) | 1,000 kg | 1,000 kg | 20' FCL 10 pallets / 10,000 kg · 40' FCL 20 pallets / 20,000 kg · Truck 22 pallets / 22,000 kg |
| Two-ply kraft paper-PE bag | 25 kg | 1,375 kg | 20' FCL 11,000 kg · 40' FCL 22,000 kg · Truck 22,000 kg |
Certificates
Technical Data Sheet (TDS)Available on request
Safety Data Sheet (SDS)Available on request
- ISO 9001
- ISO 14001
- ISO 45001
- ISO/IEC 17025
Key Features
- Low structure — Leaves flexibility in the compound with an OAN of 72 ml/100 g.
- High elongation at break — Low modulus, high elongation: resistant to dynamic fatigue.
- Excellent tensile strength — Reliable in plies that carry structural loads.
- Improved compound flexibility — Increases crack resistance in carcass and body compounds.
Industries Served
Industrial Rubber
Carbon black for rubber products beyond tires: conveyor belts, hoses, seals, diaphragms…
Similar Grades
Trial program
How does it work?
1-pallet trial offer
Test the product and return it if you are not satisfied. No obligation.
Frequently Asked Questions About This Product
Why is N326 a low-structure hard grade?
With an OAN of 72 ml/100 g, N326 has the lowest value among the hard grades. This leaves flexibility in the compound: low modulus and high elongation at break. The profile is an advantage in plies that flex and fatigue continuously, because high modulus accelerates crack initiation there.
Why is N326 preferred in off-the-road tires?
The combination of high elongation at break and excellent tensile strength provides cut resistance on stone and sharp surfaces. This behavior is decisive in off-the-road tire treads and carcass plies.
What packaging is N326 available in?
We offer two options: a 1,000 kg double-valve PP-PE jumbo bag and a 25 kg two-ply kraft paper-PE bag. A pallet of bags holds 1,375 kg of product; a 20' container takes 11,000 kg and a truck 22,000 kg. With jumbo bags, these figures are 10,000 kg and 22,000 kg respectively.
Does N326 come with a certificate of analysis and a safety data sheet?
Yes. Every shipment is sent with a certificate of analysis (CoA) for that batch, issued by an ISO/IEC 17025 accredited laboratory. We send the safety data sheet (SDS) on request; if you would like to see a sample report before ordering, you can ask for one through the quote form.