PSU (polysulfone) is a high temperature, amber colored, semi-transparent plastic material with good mechanical properties. PSU is resistant to degradation from hot water and steam and is often used in medical and food preparation applications where repeated sterilization is required. PSU is available in FDA compliant grades. Please ask your Curbell Plastics representative for more specific information. Get a quote or shop for PSU. For a glossary of terms, see our Plastic Properties Descriptions. TYPICAL PROPERTIES UNITS ASTM TEST Tensile Strength psi D638 10,200 Flexural Modulus of Elasticity psi D790 390,000 Izod Impact (notched) ft-lbs/in of notch D256 1.3 Heat Deflection Temperature (66psi / 264psi) °F D648 358 345 Water Absorption (Immersion 24 hours) % D570 0.30 PHYSICAL PROPERTIES UNITS ASTM TEST Specific Gravity - D792 1.24 Water Absorption (Immersion 24 hours) % D570 0.30 MECHANICAL PROPERTIES UNITS ASTM TEST Tensile Strength psi D638 10,200 Tensile Modulus of Elasticity psi D638 360,000 Tensile Elongation % D638 50 - 100 Flexural Strength psi D790 15,400 Flexural Modulus of Elasticity psi D790 390,000 Compressive Strength psi D695 13,900 Hardness scale as noted D785, D2240 M75, R125, Shore D 80 Izod Impact ft-lbs/in D256 1.3 THERMAL PROPERTIES UNITS ASTM TEST Coefficient of Linear Thermal Expansion in/in/°F x 10-5 D696 3.1 Heat Deflection Temperature (66psi / 264psi) °F D648 358 345 Max Continuous Service Temperature In Air °F - 285 ELECTRICAL PROPERTIES UNITS ASTM TEST Dielectric Strength V/mil D149 425 OPTICAL PROPERTIES UNITS ASTM TEST Light Transmittance % D1003 - Haze % D1003 - OTHER UNITS ASTM TEST Coefficient of Friction - Dynamic - Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand. Still Not Sure if You Need PSU? Research PSU or Ask a Plastics Expert.