Meets MIL-I-24768/28 GEB-F.
Industrial Phenolic Laminates are made by applying heat and pressure to layers of paper, canvas, linen or glass cloth impregnated with synthetic themosetting resins. When heat and pressure are applied to the layers, a chemical reaction (polymerization) transforms the separate layers into a single laminated material with a "set" shape that cannot be softened again - therefore, these materials are called "thermosets". A variety of resin types and cloth materials can be used to manufacture thermoset laminates with a range of mechanical, thermal, and electrical properties.

Physical strength, resiliency, ease and versatility of fabrication, and excellent electrical properties make Phenolic Laminates useful as support components in a wide range of mechanical and electrical applications. Phenolic Laminates are strong, stiff, and have high impact and compressive strengths. And they do not soften upon re-heating, so they are easy to saw, drill, tap, and machine with ordinary tools.

A laminate produced from a woven fiberglass cloth and epoxy resin binder. It is more heat resistant than G-10/FR-4, offering good retention of mechanical strength at elevated temperatures.

Unit of Measure

Sheet Size

N/A 36 x 48 in


N/A 0.250 in


N/A ± 0.015 in


N/A 2.48 lb/ft²

Density (ASTM D792)

N/A 1.85 g/cm³

Hardness - Rockwell (ASTM D785)

N/A M110

Water Absorption - 24 hrs at 0.125" (ASTM D570)

N/A 0.15 %

Tensile Strength - Lengthwise (ASTM D638)

N/A 48000 psi

Tensile Strength - Crosswise (ASTM D638)

N/A 44000 psi

Flexural Strength - Lengthwise (ASTM D790)

N/A 70000 psi

Flexural Strength - Crosswise (ASTM D790)

N/A 62000 psi

Flexural Modulus - Lengthwise (ASTM D790)

N/A 17 x 105 psi

Flexural Modulus - Crosswise (ASTM D790)

N/A 15 x 105 psi

Compressive Strength

N/A 75000 psi

Izod Impact Strength, Notched - Lengthwise (ASTM D256)

N/A 13 ft·lb/in

Izod Impact Strength, Notched - Crosswise (ASTM D256)

N/A 10 ft·lb/in

Coefficient of Thermal Expansion - Lengthwise

N/A 0.72 x 10-5 in/in/ºF

Coefficient of Thermal Expansion - Crosswise

N/A 0.83 x 10-5 in/in/ºF

Maximum Operating Temperature

N/A 400 ºF

Flammability Rating (UL 94)


Dielectric Strength - Short Time, 0.125" (ASTM D149)

N/A 530 V/mil