PA66 (Nylon 66)
Polyamide 66 — stiffer and more heat-resistant than PA6. Higher crystallinity gives better creep resistance and ~40°C higher melting point (260°C vs 220°C). Slightly more brittle. More moisture-sensitive at saturation than PA6. Trade names include Ultramid A (BASF), Zytel 101 (DuPont), Tecamid 66 (Ensinger). Dominant in US/UK markets. Used for automotive engine components, electrical connectors, gears, cable ties, and industrial bushings.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| ISO | INT | PA66 | — | REF | |
| 🇺🇸 | ASTM | USA | Nylon 66 / ASTM D4066 Group 111 | — | 100% |
Sources: ISO 1874-1, ASTM D4066
Mechanical properties — Pro
Dry As Molded
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Elastic Modulus | ||
| Density | ||
| Melting Point | ||
| Glass Transition Temp (Tg) | ||
| Water Absorption (24h) |
Conditioned 50rh
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Elastic Modulus |
Dry (as molded)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Tensile Modulus | ||
| Elongation at Break | ||
| Charpy Impact (notched) |
Conditioned (50% RH)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Tensile Modulus | ||
| Charpy Impact (notched) |
General
| Property | Value | Unit |
|---|---|---|
| Density | ||
| Melting Point | ||
| Glass Transition Temp | ||
| Water Absorption (24h) | ||
| Water Absorption (saturation) |
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