Engineering plastics
PA 6.6
Polyamide 6.6 (nylon)
A high-strength, wear-resistant polyamide. Used for mechanical parts such as bushings, gears and handles; absorbs moisture and changes dimensions.
- HARDNESS
- Rockwell R108–R121
- Rm · MPa (typical)
- 77–85
- TEMPERATURE
- −40 … +100 °C
- COST
Design
Polymer; defined by its structure and filler type rather than chemical composition.
Mechanical properties
| TYPE · CONDITION | Rm MPa | Elongation at break % | Hardness | Coefficient of friction | Water absorption % |
|---|---|---|---|---|---|
| Unfilled, typical | 77–85 | — | Rockwell R108–R121 | 0.25–0.28 | 1.2–1.5 |
Typical values (the standard gives no minimum values); they vary with grade and filler. Converted from US units.
Service temperature
−40 °C+100 °C−200−1000100200300400500600700800
−40 … 100 °C. The trade name "Tragamid" links to this page.
Physical properties and heat treatment
- DENSITY
- ≈ 1.14 g/cm³
Media suitability GENERAL TREND
Water
Steam
Mineral oil
Fuel, aliphatic HC
Ozone, outdoor
Dilute acid
Caustic
Ketones, esters
Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.
Strengths and weaknesses
Strengths
- High strength and wear resistance
- Resistant to oil and fuels
- Economical
Weaknesses
- Absorbs water: dimensions and strength change
- Degrades in acids
- Hydrolysis in hot water
Manufacturing and use
- ECONOMY
- Low.
- MANUFACTURING METHODS
- Injection moulding · Cast nylon (bar)
- TYPICAL VALVE PARTS
- Bushing · Handle · Gear · Position indicator
Used in 1 Emsal product
Source: ISO 16396. Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.