Beryllium copper CuBe2 achieves the highest strength and hardness available among all copper alloys after age hardening, and is consequently very widely used. The alloy 190 has the same chemical composition as the alloy Brush 25 but it is delivered mill hardened. As no further age hardening is necessary, there is no distorsion of the finished parts and the customer avoids the expensive hardening process. It exhibits various bendability according to the different tempers: a bending at 90° is possible independently of thickness, bending direction and radius for the AM temper, for the other tempers from ¼ HM to XHMS, the minimal radius of bending change from 1 to 6X the thickness of the strip (see table). The alloy Brush 190 provides a unique combination of very high strength and high conductivity, high fatigue strength limit and an excellent thermal strength relaxation behaviour.

Typical uses
Contacts springs for the manufacture of connectors, switchblades, bellows, diaphragms, many parts for the clock industry: needles, wheels, springs, etc.