Changes

Copper and nickel are in their solid and liquid phase completely soluble in each other (<xr id="fig:Phase_diagram_of_copper-nickel_for_the_range_of_0-50_wt_nickel"/><!--(Fig. 5.21)-->). Because of their very low electrical conductivity, they are mainly used as resistance alloys (<xr id="fig:Electrical_conductivity_of_copper-nickel_alloys_as_a_function_of_nickel_content"/><!--(Fig. 5.22)-->). The work hardening and softening behavior of CuNi alloys and CuNi9Sn2 are shown in [[#figures6|(Figs. 3 – 7)]]<!--(Figs. 5.23 – 5.27)-->. Coppernickel alloys exhibit high corrosion resistance, good weldabilty and the suitability for cladding to other materials. Because of these and their other properties (<xr id="tab:Physical_ Properties_of_Selected_Copper_Nickel_Alloys"/><!--(Tab. 5.15)--> and <xr id="tab:Mechanical_Properties_of_Selected_Copper_Nickel_Alloys"/><!--(Tab. 5.16)--> ) they are, with and without additives of iron or manganese, widely used as good weldable backing layers on weld buttons and weld profiles (weld tapes).

Copper-Nickel- multi component alloys with 9 wt% Ni and 2 wt% Sn are used mainly as connector materials because of their suitable mechanical properties, their excellent relaxation behavior, and their high corrosion resistance. Other advantages include their high temperature stability and the good solderability , even after longer storage. They are also used as base materials for clad profiles and tapes. <xr id="fig:Phase_diagram_of_copper-nickel_for_the_range_of_0-50_wt_nickel"/><!--Fig. 5.21:--> Phase diagram of copper-nickel for the range of 0 – 50 wt% nickel <xr id="fig:Electrical_conductivity_of_copper-nickel_alloys_as_a_function_of_nickel_content"/><!--Fig. 5.22:--> Electrical conductivity of copper-nickel alloys as a function of nickel content

[[File:Strain hardening of copper nickel alloys as function.jpg|left|thumb|<caption>Strain hardening of copper-nickel alloys as a function of nickel content</caption>]]