# Annealed Commercially Pure Palladium

Annealed palladium is commercially pure palladium in the annealed condition. It has the lowest strength and highest ductility compared to the other variants of commercially pure palladium.

The graph bars on the material properties cards below compare annealed 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

11 *%*

Knoop Hardness

68

Poisson's Ratio

0.39

Shear Modulus

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

Shear Strength

120 *MPa* 17 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

200 *MPa* 28 *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 *points*

Strength to Weight: Bending

6.2 *points*

Thermal Shock Resistance

9.8 *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