1.1 ,This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified:
| Copper Alloy | Nominal Composition, % | ||
| Beryllium | Cobalt | Nickel | |
| C17500 | 0.50 | 2.6 | , |
| C17510 | 0.40 | , | 1.8 |