Background

Alloys with compositions in the range Cu-4Ni-4Sn to Cu-15Ni-8Sn harden by spinodal decomposition. This process is similar to a conventional age-hardening reaction but instead of a fine precipitate forming, periodic variations in composition develop in the crystal lattice. This leads to very considerable increases in strength without macroscopic distortion.
Key Properties

· Excellent elastic properties

· High resistance to stress relaxation
Applications
Electrical Contacts

These alloys are used for electrical contacts, particularly in very arduous applications such as telecommunications.