Menu (ESC)

Solution Annealed ASTM B563 Palladium-Silver-Copper Alloy

Solution annealed ASTM B563 is ASTM B563 Pd-Ag-Cu in the solution annealed (AT) condition. It has the lowest strength and highest ductility compared to the other variants of ASTM B563 Pd-Ag-Cu.

The graph bars on the material properties cards below compare solution annealed ASTM B563 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

17 %

Knoop Hardness


Poisson's Ratio


Shear Modulus

37 GPa 5.4 x 106 psi

Shear Strength

470 MPa 68 x 103 psi

Tensile Strength: Ultimate (UTS)

760 MPa 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

150 J/g

Melting Completion (Liquidus)

1180 °C 2160 °F

Melting Onset (Solidus)

1030 °C 1890 °F

Specific Heat Capacity

260 J/kg-K 0.063 BTU/lb-°F

Thermal Expansion

14 µm/m-K

Other Material Properties


11 g/cm3 690 lb/ft3

Electrical Conductivity: Equal Volume

5.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

4.6 % IACS

Common Calculations

Stiffness to Weight: Axial

5.2 points

Stiffness to Weight: Bending

14 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

17 points

Thermal Shock Resistance

39 points

Alloy Composition

Palladium (Pd)Pd 43 to 45
Silver (Ag)Ag 37 to 39
Copper (Cu)Cu 15.5 to 16.5
Nickel (Ni)Ni 0.8 to 1.2
Platinum (Pt)Pt 0.8 to 1.2
Residualsres. 0 to 0.4

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

Followup Questions

Further Reading

ASTM B563: Standard Specification for Palladium-Silver-Copper Electrical Contact Alloy

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