🧩 PA610 – Polyamide 6/10
(Semi-aromatic polyamide with low moisture absorption, high chemical resistance, and excellent thermal stability. It is a modern alternative to PA6 and PA66, offering a balance between flexibility, strength, and dimensional stability. Highly valued in automotive components exposed to moisture or chemicals.)
🔹 What is PA610
PA610 is a semi-crystalline polyamide obtained through the polycondensation of hexamethylenediamine and sebacic acid (derived from castor oil, a bio-source).
The result is a polyamide with reduced water absorption, better elasticity than PA66, but similar chemical resistance. PA610 is used in connectors, covers, pipes, gaskets, and technical car parts where exposure to oils, antifreeze, or vibrations is constant.
🔧 Composition
- Polyamide 6/10 (PA610): 100%
- Additives: UV stabilizers, lubricants, glass fibers (optional).
- Density: 1.07–1.13 g/cm³
- Melting Point: ≈ 220–225 °C
- Chemical Resistance: Excellent (oils, fuels, antifreeze).
- Water Absorption: <1.5% (half of PA6).
- Continuous Heat Resistance: up to 120 °C.
🚗 Where PA610 is used in the automotive industry
| Component | Example parts | Observations |
| Electrical / Connect. | Housings, plugs, terminals | Electrical insulation and dimensional stability |
| Engine Bay | Covers, pipes, supports | High chemical and thermal resistance |
| Fluid Systems | Hoses, nozzles, fittings | Resists pressure and chemicals |
| Tech / Structural | Clips, small housings | Balanced durability and flexibility |
🔧 Welding Temperature and Methods
| Method | Optimal Temperature | Observations |
| Hot Air | 260 – 280 °C | Uniform melting, clean weld |
| Heat Plate (Mirror) | 250 – 270 °C | Solid joint for thick parts |
| Manual Extrusion | 250 – 270 °C | Suitable for long cracks |
🔩 What to Weld PA610 With (Material Compatibility)
PA610 compatibility is particularly good with other polyamides and related technical materials.
✅ Compatible with:
- PA610 ↔ PA6 / PA66 / PA12 / PA-GF / PMMA+PA – excellent.
- PA610 ↔ PBT / PET / PC+PBT – partially compatible.
❌ Incompatible with:
- PP, PE, PVC, PS, ABS, ASA, pure PMMA – completely different melting points.
💡 ReplastMD Recommendation:
Use PA610 rods or technical PA6 rods at 260–280 °C. Preheat the part to remove internal moisture. Slow cooling prevents shrinkage and stress after welding.
🏭 Manufacturers and Trade Names
- Arkema: Rilsan® PA610
- BASF: Ultramid® S
- DuPont: Zytel® 610
- Evonik: Vestamid® D
🧠 How to Identify PA610
- Engraved marking: >PA610<, >Nylon 610<, >Rilsan<, >Vestamid<.
- Matte surface, slightly flexible.
- Blue flame with yellow tip, faint nylon smell.
- Does not deform with moisture like PA6.
- ReplastMD practical test: If the part is semi-matte, durable, slightly elastic, and marked >PA610< – it’s a confirmed Polyamide 6/10.
🛠️ PA610 Welding at ReplastMD:
At our ReplastMD service center (Chisinau, Ciocana sector), we perform professional PA610 welding for technical housings, connectors, and engine bay components, ensuring a high-quality, chemically resistant repair.