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90-Silver 10-Nickel Electrical Contact Alloy

90-silver 10-nickel is a precious metal alloy formulated for use in electrical contacts. It has a moderately high electrical conductivity among the precious metal electrical contact alloys in the database.

The properties of 90-silver 10-nickel include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 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


Shear Modulus

30 GPa 4.4 x 106 psi

Tensile Strength: Ultimate (UTS)

250 to 420 MPa 36 to 61 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


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

6.7 to 11 points

Strength to Weight: Bending

8.5 to 12 points

Thermal Shock Resistance

11 to 19 points

Alloy Composition

Silver (Ag)Ag 89 to 91
Nickel (Ni)Ni 8.8 to 11
Residualsres. 0 to 0.2

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

Followup Questions

Similar Alloys

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