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PtIr5 Soft Annealed (A) – High-Performance Platinum‑Iridium Contact Material

The platinum-iridium material PtIr5, also Pt95Ir5 or 95Pt5Ir, is used as contact material.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

21.5 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

190 GPa

Elongation

20.0 °C

26 %

Hardness, Vickers

20.0 °C

80 [-]

Poisson's ratio

23.0 °C

0.39 [-]

Typical for Platinum

Shear modulus

23.0 °C

62 GPa

Typical for Platinum

Tensile strength

20.0 °C

250 MPa

Yield strength Rp0.2

20.0 °C

170 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

8.8E-6 - 9.1E-6 1/K

Typical for Platinum

Melting point

1769 °C

Typical for Platinum

Specific heat capacity

23.0 °C

136 J/(kg·K)

Typical for Platinum

Thermal conductivity

20.0 °C

42 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

5.60E+6 S/m

Electrical resistivity

20.0 °C

1.79E-7 Ω·m

Chemical properties

PropertyValue

Iridium

5 %

Platinum

95 %


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