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.

Lexan® 3413R is a 30% glass-reinforced polycarbonate. This 30% glass-reinforced material demonstrates higher strength, rigidity, creep strength and dimensional stability than unfilled Polycarbonate. These properties and good fatigue strength make Lexan® 3413R polycarbonate material suitable for use in parts that are exposed to high static loads over long periods in high temperature conditions.