# 30% Glass Fiber (30 GF) PAI

30 GF PAI is a grade of PAI. The graph bars on the material properties cards below compare 30 GF PAI to: imide plastics (top), all thermoplastics (middle), 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

300 *MPa* 44 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

6.9 *GPa* 1.0 *x 10 ^{6} psi*

Elongation at Break

5.0 *%*

Flexural Modulus

6.8 *GPa* 1.0 *x 10 ^{6} psi*

Flexural Strength

260 *MPa* 38 *x 10 ^{3} psi*

Impact Strength: Notched Izod

110 *J/m* 2.0 *ft-lb/in*

Tensile Strength: Ultimate (UTS)

180 *MPa* 26 *x 10 ^{3} psi*

## Thermal Properties

Glass Transition Temperature

280 *°C* 530 *°F*

Heat Deflection Temperature At 1.82 MPa (264 psi)

280 *°C* 530 *°F*

Maximum Temperature: Autoignition

530 *°C* 980 *°F*

Maximum Temperature: Decomposition

490 *°C* 910 *°F*

Maximum Temperature: Mechanical

260 *°C* 500 *°F*

Specific Heat Capacity

930 *J/kg-K* 0.22 *BTU/lb-°F*

Thermal Conductivity

0.36 *W/m-K* 0.21 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Other Material Properties

Density

1.6 *g/cm ^{3}* 99

*lb/ft*

^{3}Dielectric Strength (Breakdown Potential)

28 *kV/mm* 1.1 *V/mil*

Limiting Oxygen Index (LOI)

45 *%*

Water Absorption After 24 Hours

0.3 *%*

Water Absorption At Saturation

1.5 *%*

## Common Calculations

Stiffness to Weight: Axial

2.4 *points*

Stiffness to Weight: Bending

40 *points*

Strength to Weight: Axial

31 *points*

Strength to Weight: Bending

44 *points*

Thermal Diffusivity

0.24 *mm ^{2}/s*

Thermal Shock Resistance

110 *points*

## Followup Questions

## Further Reading

Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999

SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000

Modern Plastics Handbook, Charles A. Harper (editor), 1999

Plastics Materials, 7th ed., J. A. Brydson, 1999