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PdAg70 Alloy – Ductile, Corrosion‑Resistant Contact Material for Telecom and Control Applications

The palladium-silver alloy PdAg70, also Pd30Ag70 or 30Pd70Ag, is used as a contact material in relays and switches in telecommunications as well as in measurement and control technology at voltages in the range 20 to 60 V and switching capacities up to 300 W. Furthermore, the material is used for potentiometers. The material is ductile, sufficiently corrosion resistant and abrasion resistant. It is non-cutting machinable, roll-clad and conditionally deductible from the gas phase.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

10.9 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

114 GPa

Elongation

20.0 °C

2 %

Hardness, Vickers

20.0 °C

180 [-]

Poisson's ratio

23.0 °C

0.39 [-]

Typical for Palladium

Shear modulus

20.0 °C

36 GPa

Tensile strength

20.0 °C

630 MPa

Yield strength Rp0.2

20.0 °C

620 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

1.6E-5 1/K

Melting point

1553 °C

Typical for Palladium

Specific heat capacity

23.0 °C

236 - 248 J/(kg·K)

Typical for Palladium

Thermal conductivity

20.0 °C

61 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.54E-7 Ω·m

Chemical properties

PropertyValue

Palladium

30 %

Silver

70 %


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