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NEMA Grade XX (PBG) Paper-Phenolic Laminate

NEMA grade XX is a grade of NEMA laminate. The graph bars on the material properties cards below compare NEMA grade XX 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

200 MPa 28 x 103 psi

Flexural Modulus

8.7 GPa 1.3 x 106 psi

Flexural Strength

100 MPa 15 x 103 psi

Impact Strength: Notched Izod

20 J/m 0.38 ft-lb/in

Rockwell M Hardness


Shear Strength

76 MPa 11 x 103 psi

Tensile Strength: Ultimate (UTS)

100 MPa 15 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

140 °C 280 °F

Thermal Expansion

20 µm/m-K

Other Material Properties


1.3 g/cm3 84 lb/ft3

Dielectric Strength (Breakdown Potential)

19 kV/mm 0.75 V/mil

Water Absorption After 24 Hours

1.3 %

Common Calculations

Strength to Weight: Axial

21 points

Strength to Weight: Bending

36 points

Followup Questions

Further Reading

NEMA LI 1: Industrial Laminated Thermosetting Products

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