Celazole is a polybenzimidazole (PBI) alloy, designed especially for extrusion and injection molding.

MechanicalASTM Test MethodCelazole PBIUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7921.30-
Tensile Strength @73 F, (ult)/(yld)D63823,000 (ult)psi
Tensile Modulus of Elasticity @73 FD638850,000psi
Tensile Elongation at Break @73 FD6383%
Flexural Strength @73 FD79032,000psi
Flexural Modulus of Elasticity @73 FD790950,000psi
Shear Strength @73 FD732-psi
Comprehensive Strength, (% Deformation) @73 FD69550,000 (10)psi
Comprehensive Modulus of Elasticity @73 FD695900,000psi
Hardness, Rockwell, Scale as noted @73 FD785M125 (E105)-
Hardness, Durometer, Shore D @73 FD2240--
Izod Impact, (Notched) @73 FD256 Type A0.5ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic-0.24-
Limiting PV, (with 4 to 1 factor of safety applied)-37,500psi-ft/min
ThermalASTM Test MethodCelazole PBIUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)1.3 E-05in/in/F
Heat Deflection Temperature @264 psiD648800 (DMA)F
Tg-Glass transition termperature, (Amorphous)D3418750 (DMA)F
Melting Point, (VS=Vicat Softening Temp.)D3418-F
Continuous Service Temperature in Air, (Max.)-650F
Thermal Conductivity-2.80BTU-in/hr-ft2-F
ElectricASTM Test MethodCelazole PBIUnits
Dielectric Strength, Short TermD149550Volts/mil
Volume ResistivityD2571.0 E+14ohm-cm
Dielectric Constant @10E6 HzD150--
Dissipation Factor @10E6 HzD150--
Flammability @3.1 mm unless notedUL94V-0-
H2OASTM Test MethodCelazole PBIUnits
Water Absorption, Immersion, 24 hoursD570(7)0.40% by weight
Water Absorption, SaturationD570(7)-% by weight