PA6, PA46, or PEEK? Who is the Cost-Performance King at 200°C?

Contender One: High-Performance Modified PA6/PA66

Temperature Resistance:

• Short-term up to 150°C; long-term 80–120°C (modified grades can reach 160–180°C).

Advantages:

• Relatively low cost
• Well-established processing technology
• Good elasticity

Performance at 200°C:

Even after modification, prolonged operation at 200°C remains marginal and prone to thermal deformation.

Contender Two: PA46 (Polyamide 46) — The “Gold Standard” for 200°C Applications

Temperature Resistance:

• Long-term 150–200°C; short-term up to 220°C.

Advantages:

• In the 200°C range, PA46 offers the most balanced performance
• High crystallinity ensures excellent stiffness and wear resistance at elevated temperatures
• Outstanding fatigue resistance

Performance at 200°C:

Effortless and reliable.

Contender Three: PEEK (Polyetheretherketone) and Other Specialty Engineering Plastics

Temperature Resistance:

• Long-term up to 260°C; some grades exceed 300°C.

Advantages:

• Exceptional heat resistance
• Flame retardancy
• Corrosion resistance
• Extremely high mechanical strength

Performance at 200°C:

For PEEK, 200°C is merely a “warm-up”; performance remains virtually unchanged.

Disadvantages:

• Extremely expensive—several to tens of times the cost of standard nylons