NEMA Grade XXX (PBE) Paper-Phenolic Laminate
NEMA grade XXX is a grade of NEMA laminate. The graph bars on the material properties cards below compare NEMA grade XXX 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 29 x 103 psi
Flexural Modulus
8.3 GPa 1.2 x 106 psi
Flexural Strength
87 MPa 13 x 103 psi
Impact Strength: Notched Izod
20 J/m 0.38 ft-lb/in
Rockwell M Hardness
110
Shear Strength
69 MPa 10 x 103 psi
Tensile Strength: Ultimate (UTS)
93 MPa 13 x 103 psi
Thermal Properties
Maximum Temperature: Mechanical
140 °C 280 °F
Thermal Expansion
20 µm/m-K
Other Material Properties
Density
1.3 g/cm3 82 lb/ft3
Dielectric Strength (Breakdown Potential)
17 kV/mm 0.67 V/mil
Water Absorption After 24 Hours
0.93 %
Common Calculations
Strength to Weight: Axial
20 points
Strength to Weight: Bending
35 points
Followup Questions
Further Reading
NEMA LI 1: Industrial Laminated Thermosetting Products
Thermosets: Structure, Properties and Applications, Qipeng Guo (editor), 2012