Cube2--C17200 (CDA 172) Beryllium Copper is the most commonly utilized Copper Beryllium alloy and is notable for its highest strength and hardness compared to commercial copper alloys.C17200 alloy contains appr. 2% of beryllium and achieves its ultimate tensile strength can exceed 200 ksi,while the hardness approaches Rockwell C45.Meanwhile, the electrical conductivity is a minimum of 22% IACS in the fullly aged condition. C17200 also exhibits exceptional resistance to stress relaxation at elevated temperatures.