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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

Silver (Ag)Ag 69 to 71
Nickel (Ni)Ni 28.8 to 31
Residualsres. 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