Glass-reinforced polycarbonate is effective in designs where metals, particularly die-cast aluminum and zinc, are commonly used. The addition of glass fibers to polycarbonate increases tensile strength, stiffness, compressive strength, and lower the thermal expansion coefficient. The greater the amount of glass fiber added to the polycarbonate, the greater the effect on each property will be. The coefficient of thermal expansion is reduced by nearly 75%, thus equaling that of some metals. While glass-reinforced has less impact strength than standard grades, it is still tougher and more impact resistant than most other plastics and die cast aluminum.Compared to standard un-filled grades, Lexan® 3414R has as much as five times the tensile modulus, more than double the flexural and tensile strength, and up to 65% more compressive strength. Creep limit at 210ºF is as high as 4000 psi under a continuous load and 10,000 psi under an intermittent load. There is a sevenfold increase in fatigue endurance and a 75% drop in the coefficient of thermal expansion.
Unit of Measure




N/A Black

ASTM (Resin Spec)

N/A D3935 PC0120G40A00000


N/A 4.00 in

Thickness Tolerance

N/A plus only in

Sheet Size

N/A 24x48 in


N/A 15-20 days


N/A 31.60 lb/ft²

Specific Gravity (ASTM D792)

N/A 1.52 gm/cc

Water Absorption - 24 hrs, 73°F (ASTM D570)

N/A .12

Water Absorption - Equilibrium, 73°F (ASTM D570)

N/A .23

Tensile Strength at Break (ASTM D638)

N/A 22900 psi

Flexural Strength - 73°F (ASTM D790)

N/A 26900 psi

Flexural Modulus

N/A 1399000 psi

Izod Impact Strength - Unnotched, 73ºF (ASTM D4812)

N/A 24 ft·lb/in

Izod Impact Strength - Notched at 73ºF (ASTM D256)

N/A 2.5 ft·lb/in

Deflection Temperature at 264 psi, 0.250" (ASTM D648)

N/A 295 ºF

Deflection Temperature at 66 psi, 0.250" (ASTM D648)

N/A 310 ºF

Vicat Softening Point (ASTM D1525)

N/A 330 ºF

Dielectric Strength

N/A 450 V/mil

Flammability at .118" UL94

N/A V0


N/A Lexan® 3414R 40% glass-reinforced material demonstrates higher strength, rigidity, creep strength and dimensional stability than unfilled Polycarbonate. These properties and good fatigue strength make Lexan® 3414R polycarbonate material suitable for use in parts that are exposed to high static loads over long periods in high temperature conditions.