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Alloys of Pt with Ru, Ir, Ni and W were widely used in electromechanical components in the telecommunication industry and in heavy duty automotive breaker points (<xr id="tab:Physikalische Eigenschaften von Platin-Metallen und deren Legierungen/>).
<figtable id="tab:Physikalische Eigenschaften von Platin-Metallen und deren LegierungenPhysical Properties of the Platinum Metals an their Alloys"><caption>'''<!--Table 2.7:-->Physikalische Eigenschaften von Platin-Metallen und deren LegierungenPhysical Properties of the Platinum Metals an their Alloys'''</caption>
{| class="twocolortable" style="text-align: left; font-size: 12px"
|-
!Material
!Platin/Palladium<br/>AnteilContent<br/>[gew.-%]!DichteDensity[g/cm<sup>3</sup>]!Schmelzpunkt oder<br/>SchmelzbereichMelting Point or Range<br/>[°C]!ElekrischeElectrical<br/>WiderstandskraftResistivity[µΩ*cm]!ElektrischeElectrical<br/>LeitfähigkeitConductivity<br/>[MS/m]!ThermischeThermal<br/>LeitfähigkeitConductivity<br/>[W/m*K]!Temperaturkoeffizient desTemp. Coefficient of the<br/>elektrischen WiderstandsElectrical Resistance<br/>[10<sup>3</sup>/K]!Elastizitätsmodulmodulus of<br/>Elasticity[Gpa]
|-
|Pt (99,95)
</figtable>
Today these components have been replaced in many applications by solid state technology and the usage of these materials is greatly reduced. Pd alloys however have a more significant importance. PdCu15 is widely used, for example in automotive flasher relays. Because of their resistance to sulfide formation PdAg alloys are applied in various relay designs. With the ability to thermally precipitation harden some multi component alloys based on PdAgAuPt, they find special usage in wear resistant sliding contact applications. Pd44Ag38Cu15PtAuZn is a standard alloy in this group (<xr id="tab:Mechanical_Properties_of_the_Platinum_Metals_and_their_Alloys"/><!--(Tab 2.8)--> and <xr id="tab:Contact_and_Switching_Properties_of_the_Platinum_Metals_and_their_Alloys"/><!--(Tab. 2.9)-->).
