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Polysulfone is an ultra stable plastic

PSU (Polysulfone)

  • Performs well in broad temperature range
  • Excellent hydrolytic stability
  • Good chemical resistance
  • High impact resistance
  • Superior electrical properties
  • Performs well in high-temperature environments


Polysulfone is a transparent, high-performance, ultra-stable polymer with a high service temperature. It has good impact and electrical properties and good resistance to inorganic acids and bases. Polysulfone also has superior hydrolytic stability against hot water and steam sterilization. 

Polysulfone resists detergents and hydrocarbon oils well even at high temperatures under moderate stress levels. And it complies with the National Sanitation Foundation's potable water standard up to 180 degrees F.


  • Medical instruments
  • Food processing equipment
  • Aircraft instruments
  • Electrical components
  • Float switches
  • Solenoid valve body
  • Manifolds


Our application engineers can help. With decades of experience in plastic material selection, we'll help you choose the optimal plastic for your application and budget.

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the cost of this material to other thermoplastics, click here.

General Material Properties

Property   Metric units   English units
Density   1.23e3 - 1.25e3 kg/m^3   0.0444 - 0.0452 lb/ft^3
Yield Strength   7.55e7 - 8.33e7 Pa   11 - 12.1 ksi
Tensile Strength   9.44e7 - 1.04e8 Pa   13.7 -15.1 ksi
Elongation   0.4 - 0.8 % strain   40 - 80 % strain
Hardness (Vickers)   2.23e8 - 2.45e8 Pa   22.7 - 25 HV
Impact Strength (unnotched)   1.9e5 - 2e5 J/m^2   90.4 - 95.2 ft.lbf/in^2
Fracture Toughness   1.89e6 - 4.69e6 Pa/m^0.5   1.72 - 4.27 ksi/in^0.5
Young's Modulus   0.0145 - 0.0153 Pa   0.38 - 0.4 10^6 psi
Max Service Temperature   147 - 172 °C   297 - 342 °F
Insulator or Conductor   Insulator   Insulator
Specific Heat Capability   1.5e3 - 1.56e3 J/kg °C   0.358 - 0.373 BTU/lb. °F
Thermal Expansion Coefficent   5.47e-5 - 5.69e-5 strain/°C   03.4 - 31.6 µstrain/°F
CO2 Footprint   5.36 - 5.92 kg/kg   5.36 - 5.92 lb/lb
Recycleable   Yes   Yes

The information on this page is intended as general guidance only and is only accurate at the time of posting (see date below). Specific material properties vary by manufacturer. Please contact a Dielectric application engineer for help in choosing the optimal material for your application and budget.

Posting Date: July 30, 2012