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NEMA Grade L (FBI) Linen-Phenolic Laminate

NEMA grade L is a grade of NEMA laminate. The graph bars on the material properties cards below compare NEMA grade L to other thermoset plastics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Compressive (Crushing) Strength

210 MPa 31 x 103 psi

Flexural Modulus

6.4 GPa 0.93 x 106 psi

Flexural Strength

110 MPa 15 x 103 psi

Impact Strength: Notched Izod

65 J/m 1.2 ft-lb/in

Rockwell M Hardness

110

Shear Strength

81 MPa 12 x 103 psi

Tensile Strength: Ultimate (UTS)

73 MPa 11 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

120 °C 250 °F

Thermal Expansion

20 µm/m-K

Other Material Properties

Density

1.3 g/cm3 84 lb/ft3

Dielectric Strength (Breakdown Potential)

12 kV/mm 0.45 V/mil

Water Absorption After 24 Hours

1.7 %

Common Calculations

Strength to Weight: Axial

15 points

Strength to Weight: Bending

29 points

Followup Questions

Further Reading

NEMA LI 1: Industrial Laminated Thermosetting Products

Thermosets: Structure, Properties and Applications, Qipeng Guo (editor), 2012