# Graphite

Graphite is a non-oxide engineering ceramic. It has the lowest thermal conductivity among non-oxide engineering ceramics. In addition, it has the lowest tensile strength and a very low density. The graph bars on the material properties cards below compare graphite to other non-oxide engineering ceramics (top) and the entire database (bottom).

## Mechanical Properties

Compressive (Crushing) Strength

90 *MPa* 13 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

21 *GPa* 3.0 *x 10 ^{6} psi*

Flexural Strength

80 *MPa* 12 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

18 *MPa* 2.6 *x 10 ^{3} psi*

## Thermal Properties

Thermal Conductivity

6.0 *W/m-K* 3.5 *BTU/h-ft-°F*

Thermal Expansion

4.9 *µm/m-K*

## Otherwise Unclassified Properties

Calomel Potential

250 *mV*

Density

1.8 *g/cm ^{3}* 110

*lb/ft*

^{3}## Common Calculations

Stiffness to Weight: Axial

6.7 *points*

Stiffness to Weight: Bending

53 *points*

Strength to Weight: Axial

2.9 *points*

Strength to Weight: Bending

8.7 *points*

Thermal Shock Resistance

12 *points*

## Followup Questions

## Further Reading

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015