... , including CuNi2Si copper bars,plates,wires. CuNi2Si – UNS.C64700/C70250 Nickel Silicon Bronze Alloys, which is an age-hardening alloy ... good fatigue strength, forming and spring properties.Typical Application for C64700/C70250 Nickel Silicon Bronze Alloys:Electrical : Resistance Welding Electrodes, ... material will be produced to DIN & RWMA CuNi2Si-- UNS.C64700 / C70250 Copper Nickel Silicon Alloys