Quarter-Hard 70-Silver 30-Nickel Alloy
Quarter-hard 70Ag-30Ni alloy is 70Ag-30Ni alloy in the quarter-hard temper. The graph bars on the material properties cards below compare quarter-hard 70Ag-30Ni 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
Poisson's Ratio
0.35
Shear Modulus
39 GPa 5.6 x 106 psi
Tensile Strength: Ultimate (UTS)
420 MPa 61 x 103 psi
Thermal Properties
Latent Heat of Fusion
170 J/g
Melting Completion (Liquidus)
960 °C 1750 °F
Melting Onset (Solidus)
960 °C 1760 °F
Specific Heat Capacity
300 J/kg-K 0.071 BTU/lb-°F
Thermal Expansion
17 µm/m-K
Other Material Properties
Density
10 g/cm3 620 lb/ft3
Electrical Conductivity: Equal Volume
69 % IACS
Electrical Conductivity: Equal Weight (Specific)
62 % IACS
Common Calculations
Stiffness to Weight: Axial
5.8 points
Stiffness to Weight: Bending
16 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
12 points
Thermal Shock Resistance
17 points
Alloy Composition
| Ag | 69 to 71 | |
| Ni | 28.8 to 31 | |
| 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