DuPont Vespel® SP-21 Polyimide Bar Stock Ø15×307mm | PI High-Temperature Plastic Rod

DuPont Vespel® SP-21 Polyimide Rod Ø307mm — SP-21 (15% Graphite Filled)

This Vespel® SP-21 polyimide (PI) bar stock from DuPont is recognized as the gold standard for extreme-temperature engineering applications. With no melting point and a long-term service range of −269°C to +300°C, Vespel components outperform metals and conventional plastics in the most demanding environments.

Key Properties

• Temperature Resistance: Continuous use from −269°C to +300°C; short-term to +400°C
• Radiation Resistance: Withstands ionizing radiation — ideal for nuclear and space applications
• Chemical Resistance: Stable in most organic solvents, fuels, and lubricants
• Dimensional Stability: Extremely low coefficient of thermal expansion
• Electrical Insulation: Excellent dielectric properties across wide temperature and frequency ranges
• Machinability: Superior CNC machinability — tight tolerances achievable

Typical Applications

Aerospace bushings and thrust washers, semiconductor process components, vacuum chamber seals, rocket engine components, precision scientific instruments

Specifications

Custom dimensions and CNC machined parts available. Contact us for a quote.