# Tungsten Carbide (WC)

Tungsten carbide is a non-oxide engineering ceramic. It has the highest density among non-oxide engineering ceramics. In addition, it has the highest fracture toughness and the lowest heat capacity. The graph bars on the material properties cards below compare tungsten carbide to other non-oxide engineering ceramics (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

4780 *MPa* 690 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

630 *GPa* 92 *x 10 ^{6} psi*

Flexural Strength

1830 *MPa* 270 *x 10 ^{3} psi*

Fracture Toughness

12 *MPa-m ^{1/2}* 11

*x 10*

^{3}psi-in^{1/2}Knoop Hardness

1670

Poisson's Ratio

0.24

Tensile Strength: Ultimate (UTS)

350 *MPa* 50 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

1000 *°C* 1830 *°F*

Specific Heat Capacity

280 *J/kg-K* 0.066 *BTU/lb-°F*

Thermal Conductivity

85 *W/m-K* 49 *BTU/h-ft-°F*

Thermal Expansion

5.4 *µm/m-K*

## Other Material Properties

Density

15 *g/cm ^{3}* 910

*lb/ft*

^{3}Electrical Resistivity Order of Magnitude

0.75 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

24 *points*

Stiffness to Weight: Bending

20 *points*

Strength to Weight: Axial

6.6 *points*

Strength to Weight: Bending

7.5 *points*

Thermal Diffusivity

21 *mm ^{2}/s*

Thermal Shock Resistance

7.2 *points*

## Followup Questions

## Further Reading

Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications, Hugh O. Pierson, 1996

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005

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