UNS C17200 / W.Nr 2.1247 / Beryllium Copper CB 101
This age hardenable copper alloy combines a range of properties suited to meet the exacting requirements of many automotive, electronic and aerospace industries .A good conductor of electricity, Beryllium Copper CB 101 is used in the manufacture of different types of springs.
Beryllium Copper CB 101 is also known as Cupro Beryllium, Beryllium Copper Alloy 25, Berylco 25, NGK 25, and Ampcoloy 83.
Beryllium Copper CB 101 offers the following key features
- Good conductor of electricity
- Age hardenable
- Good mechanical properties
Chemical Composition
Element | Min % | Max % |
Be | 1.70 | 2.10 |
Fe | – | 0.20 |
Ni | – | 0.30 |
Co | – | 0.30 |
Cu | bal | bal |
Beryllium Copper CB 101 Details
Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
8.25 g/cm³ | 980 °C | 17.8 μm/m °C (20 – 100 °C) | 47 kN/mm² | 123 kN/mm² |
0.298 lb/in³ | 1800 °F | 9.9 x 10-6 in/in °F (70 – 212 °F) | 6817 ksi | 17840 ksi |
Heat treatment
Condition as supplied by AWI | Type | Temperature | Time | Cooling |
Annealed | Age Harden | 315 – 320 °C (600 – 610 °F) | 3 Hr | Air |
Spring Temper | Age Harden | 315 – 320 °C (600 – 610 °F) | 2 Hr | Air |
Applications
Beryllium Copper CB 101 is known to be suitable for the following applications:
- Springs
- Electrical connectors & switches
- Electronic components
