Copper Alloy CuNi2SiCr


CuNi2SiCr is a thermal curable copper alloy. Typical for CuNi2SiCr is a favorable combination of electrical and thermal conductivity accompanied by high stiffness, also at elevated temperatures. This copper alloy features a high corrosion resistance and is very well suited for wear and sliding applications. Furthermore, CuNi2SiCr fulfills the requirements of a conductive contact material in electrical engineering and for electrodes in welding.
CuNi2SiCr is used for tooling because of its strong hardness and its high level of wear resistance. Furthermore, CuNi2SiCr-alloy is very well suited for highly thermally-stressed construction elements and for the use of a beryllium-free copper alloy.

Mechanical Properties Test Method As Built Precipitation Hardering
Tensile strength DENI EN 10002 Approx. 250 ± 10 MPa Approx. 630 ± 50 MPa
Yield strength (Rp 0.2 %) DENI EN 10002 Approx. 190 ± 10 MPa Approx. 580 ± 50 MPa
Elongation at break DENI EN 10002 Approx. 34 ± 5% Approx. ~ 10 %
Young's Modulus ------- Approx. 90 ± 5 MPa Approx. 130 ± 10 GPa
Hardness ------- ------- HB 220
Thermal Properties As Built Precipitation Hardering
Thermal Conductivity 90 W/mK 190 W/mk
Electrical Properties As Built Precipitation Hardering
Electrical Conductivity 8 MS/m 23 MS/m
Physical and Chemical Composition    
Chemical composition Cu
Ni
Si
Cr
Ti
Co
Fe
Balance
2 – 2,5 %
0,65 %
0,45 %
< 0,03 %
< 0,02 %
< 0,02 %
Physical Composition Relative density Approx. 99,8 %
  Density 8,85 g/cm3