# Commercially Pure Palladium

Commercially pure palladium is a precious metal alloy formulated for use in electrical contacts.

The properties of commercially pure palladium include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare commercially pure palladium to: precious metal electrical contact alloys (top), all alloys in the same category (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

Elastic (Young's, Tensile) Modulus

120 *GPa* 18 *x 10 ^{6} psi*

Elongation at Break

1.1 to 11 *%*

Knoop Hardness

68 to 130

Poisson's Ratio

0.39

Shear Modulus

43 *GPa* 6.3 *x 10 ^{6} psi*

Shear Strength

120 to 200 *MPa* 17 to 29 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

200 to 380 *MPa* 28 to 55 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

160 *J/g*

Melting Completion (Liquidus)

1550 *°C* 2830 *°F*

Melting Onset (Solidus)

1550 *°C* 2830 *°F*

Specific Heat Capacity

240 *J/kg-K* 0.057 *BTU/lb-°F*

Thermal Expansion

12 *µm/m-K*

## Other Material Properties

Density

12 *g/cm ^{3}* 750

*lb/ft*

^{3}Electrical Conductivity: Equal Volume

16 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

12 *% IACS*

## Common Calculations

Stiffness to Weight: Axial

5.6 *points*

Stiffness to Weight: Bending

14 *points*

Strength to Weight: Axial

4.5 to 8.8 *points*

Strength to Weight: Bending

6.2 to 9.7 *points*

Thermal Shock Resistance

9.8 to 19 *points*

## Alloy Composition

Pd | 99.8 to 100 | |

res. | 0 to 0.2 |

All values are % weight. Ranges represent what is permitted under applicable standards.

## Followup Questions

## Further Reading

ASTM B683: Standard Specification for Pure Palladium Electrical Contact Material