Quarter-Hard Commercially Pure Palladium
Quarter-hard palladium is commercially pure palladium in the quarter-hard temper. The graph bars on the material properties cards below compare quarter-hard 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 106 psi
Elongation at Break
2.2 %
Poisson's Ratio
0.39
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
170 MPa 25 x 103 psi
Tensile Strength: Ultimate (UTS)
310 MPa 44 x 103 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/cm3 750 lb/ft3
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
7.1 points
Strength to Weight: Bending
8.4 points
Thermal Shock Resistance
15 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