Meets MIL-I-24768/17 Type GSG.
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.

Composed of a continuous glass woven cloth base impregnated with a silicone resin binder, this grade has excellent heat and arc resistance. It has extremely good dielectric loss properties under dry conditions and good electrical and good electrical properties under humid conditions, although the percentage of change is high.

Unit of Measure


N/A ± 0.001 in


N/A 4 ft

Density (ASTM D792)

N/A 1.85 g/cm³

Hardness - Rockwell (ASTM D785)

N/A M100

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

N/A 0.10 %

Tensile Strength - Lengthwise (ASTM D638)

N/A 23000 psi

Tensile Strength - Crosswise (ASTM D638)

N/A 19000 psi

Flexural Strength - Lengthwise (ASTM D790)

N/A 25000 psi

Flexural Strength - Crosswise (ASTM D790)

N/A 22000 psi

Flexural Modulus - Lengthwise (ASTM D790)

N/A 9 x 105 psi

Flexural Modulus - Crosswise (ASTM D790)

N/A 8 x 105 psi

Compressive Strength

N/A 43000 psi

Izod Impact Strength, Notched - Lengthwise (ASTM D256)

N/A 15 ft·lb/in

Izod Impact Strength, Notched - Crosswise (ASTM D256)

N/A 12 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 0.90 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 250 V/mil