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→5.2.2 Nickel Alloys
Because of its low electrical conductivity NiCu30Fe is besides pure Ni and CuNi alloys the most widely used backing material for weldable contact components. With 1 – 2 wt% additives of Fe as well as 0.5 – 1 wt% Mn and Co the mechanical strength of the binary alloy NiCu30 can be increased.
The strength values of NiCu30Fe are significantly higher than those of the copper rich CuNi alloys [[#figures12|(Figs. 3 7 – 78)]] (Figs. 5.47 and 5.48). The good spring properties and thermal stability of NiCu30Fe make it a suitable material for the use as thermally stressed contact springs.
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