Quarter-Hard 90-Silver 10-Nickel Alloy
Quarter-hard 90-silver 10-nickel is 90-silver 10-nickel in the quarter-hard temper. The graph bars on the material properties cards below compare quarter-hard 90-silver 10-nickel 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
82 GPa 12 x 106 psi
Poisson's Ratio
0.36
Shear Modulus
30 GPa 4.4 x 106 psi
Tensile Strength: Ultimate (UTS)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
130 J/g
Melting Completion (Liquidus)
840 °C 1540 °F
Melting Onset (Solidus)
960 °C 1760 °F
Specific Heat Capacity
260 J/kg-K 0.061 BTU/lb-°F
Thermal Expansion
19 µm/m-K
Other Material Properties
Density
10 g/cm3 640 lb/ft3
Electrical Conductivity: Equal Volume
90 % IACS
Electrical Conductivity: Equal Weight (Specific)
79 % IACS
Common Calculations
Stiffness to Weight: Axial
4.4 points
Stiffness to Weight: Bending
14 points
Strength to Weight: Axial
8.3 points
Strength to Weight: Bending
9.9 points
Thermal Shock Resistance
14 points
Alloy Composition
| Ag | 89 to 91 | |
| Ni | 8.8 to 11 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B693: Standard Specification for Silver-Nickel Electrical Contact Materials
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015