Technical information

GRP — properties and data

An overview of the mechanical, chemical and thermal properties that make glass-reinforced plastic a first choice in demanding environments.

Strength

Tensile and flexural strength comparable to structural steel — at significantly lower weight.

Operating range typically -40 °C to +80 °C, with specialty resin up to +140 °C.

No galvanic corrosion, ideal for rail and electrical infrastructure.

Available to EN 13501-1, ASTM E84 Class 1 and similar standards.

Withstands acids, alkalis, salts and hydrocarbons — select resin by environment.

Standard profiles in metric and imperial sizes, cut to length.

Density1.8 – 1.9 g/cm³

Tensile strength (lengthwise)240 – 400 MPa

E-modulus (lengthwise)17 – 28 GPa

Flexural strength240 – 350 MPa

Compressive strength240 – 320 MPa

Thermal expansion8 – 10 × 10⁻⁶ /K

Water absorption< 0.5 %

Electrical dielectric strength> 10 kV/mm

UV resistanceVery good (with surface coating)

Values are indicative — exact values depend on product, resin selection and fibre orientation. Contact us for datasheets.