G10/FR-4 is a glass epoxy composite material that consists of glass fabric and electrical grade epoxy resin. It is flame retardant, has outstanding electrical properties, and is widely used as an insulator for electrical and electronic applications. G10/FR-4 Glass Epoxy is also used for mechanical applications when outstanding strength, stiffness, and excellent creep resistance are required. Get a quote or shop for G10/FR-4 Glass Epoxy. For a glossary of terms, see our Plastic Properties Descriptions. TYPICAL PROPERTIES UNITS ASTM TEST Tensile Strength psi D638 38,000 Flexural Modulus of Elasticity psi D790 2,400,000 Izod Impact (notched) ft-lbs/in of notch D256 12.0 Heat Deflection Temperature (66psi / 264psi) °F D648 - Water Absorption (Immersion 24 hours) % D570 - PHYSICAL PROPERTIES UNITS ASTM TEST Specific Gravity - D792 1.80 Water Absorption (Immersion 24 hours) % D570 - MECHANICAL PROPERTIES UNITS ASTM TEST Tensile Strength psi D638 38,000 Tensile Modulus of Elasticity psi D638 - Tensile Elongation % D638 - Flexural Strength psi D790 60,000 Flexural Modulus of Elasticity psi D790 2,400,000 Compressive Strength psi D695 55,000 Hardness scale as noted D785, D2240 M115 Izod Impact ft-lbs/in D256 12.0 THERMAL PROPERTIES UNITS ASTM TEST Coefficient of Linear Thermal Expansion in/in/°F x 10-5 D696 - Heat Deflection Temperature (66psi / 264psi) °F D648 - Max Continuous Service Temperature In Air °F - 284 ELECTRICAL PROPERTIES UNITS ASTM TEST Dielectric Strength V/mil D149 - 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 G10/FR-4 Glass Epoxy? Research G10/FR-4 Glass Epoxy or Ask a Plastics Expert.