This age hardenable copper alloy combines a range of properties suited to meet the exacting requirements of many automotive, electronic and aerospace industries.
Beryllium Copper CB 101 is also known as Cupro Beryllium, Beryllium Copper Alloy 25, Berylco 25, NGK 25, and Ampcoloy 83.
| Element | Min % | Max % |
| Be | 1.70 | 2.10 |
| Fe | – | 0.20 |
| Ni | – | 0.30 |
| Co | – | 0.30 |
| Cu | bal | |
Density
8.25 g/cm³ | 0.298 lb/in³
Melting Point
980°C | 1800°F
Coefficient of Expansion
17.8 μm/m °C (20 – 100°C) | 9.9 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
47 kN/mm² | 6817 ksi
Modulus of Elasticity
123 kN/mm² | 17840 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | Age Harden | 315 – 320 | 600 – 610 | 3 | Air |
| Spring Temper | Age Harden | 315 – 320 | 600 – 610 | 2 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 400 – 600 | 58 – 87 | up to +200 | up to +390 |
| Annealed + Aged | 800 – 1200 | 116 – 174 | up to +200 | up to +390 |
| Spring Temper | 800 – 1200 | 116 – 174 | up to +200 | up to +390 |
| Spring Temper + Aged | 1200 – 1600 | 174 – 232 | up to +200 | up to +390 |