Quarter-Hard 60-Palladium 40-Silver Alloy
Quarter-hard 60Pd-40Ag alloy is 60Pd-40Ag alloy in the quarter-hard temper. The graph bars on the material properties cards below compare quarter-hard 60Pd-40Ag alloy 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
100 GPa 15 x 106 psi
Elongation at Break
1.1 %
Knoop Hardness
150
Poisson's Ratio
0.38
Shear Modulus
37 GPa 5.3 x 106 psi
Shear Strength
290 MPa 43 x 103 psi
Tensile Strength: Ultimate (UTS)
520 MPa 75 x 103 psi
Thermal Properties
Latent Heat of Fusion
140 J/g
Melting Completion (Liquidus)
1360 °C 2480 °F
Melting Onset (Solidus)
1310 °C 2390 °F
Specific Heat Capacity
240 J/kg-K 0.057 BTU/lb-°F
Thermal Conductivity
29 W/m-K 17 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Other Material Properties
Density
11 g/cm3 710 lb/ft3
Electrical Conductivity: Equal Volume
4.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.2 % IACS
Common Calculations
Stiffness to Weight: Axial
4.9 points
Stiffness to Weight: Bending
14 points
Strength to Weight: Axial
13 points
Strength to Weight: Bending
13 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
25 points
Alloy Composition
| Pd | 59.5 to 60.9 | |
| Ag | 39.1 to 40.5 | |
| Cu | 0 to 0.1 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B731: Standard Specification for 60% Palladium-40% Silver Electrical Contact Material