High Elastic C17200 Beryllium Copper Foil - China Suppliers & Factory for Electronic Connectors and Precision Components
| Element | Content |
| Beryllium (Be) | 1.8 – 2.0 |
| Cobalt + Nickel (Co+Ni) | ≥0.2 |
| Copper (Cu) | Remaining amount |
| Impurities | ≤0.15 |
| Project | Values |
| Tensile strength | 1250 – 1500 MPa |
| Yield strength | ≥1100 MPa |
| Hardness | HV 360 – 430 |
| Elongation | 2 – 8% |
| Project | Values |
| Density | 8.25 g/cm³ |
| Electrical conductivity | 20 – 28% IACS |
| Thermal conductivity | ≈105 W/m·K |
| Elastic modulus | ≈128 GPa |
- High-precision connectors, terminals, contact springs
- Relays, push-button switches, elastic elements for temperature control switches
- RF connectors, high-frequency probes
- Battery contact tabs, high-current elastic contacts
- Non-magnetic connectors, fatigue-resistant and highly reliable spring elements
- Satellites, radar high-frequency contact components
- Diaphragms, bellows, pressure gauge elastic elements
- Sensor elastic bodies, micro-displacement mechanisms
The alloy consists of 1.8% to 2.0% Beryllium (Be), a minimum of 0.2% Cobalt and Nickel (Co+Ni), with the remaining balance being Copper (Cu). Impurities are strictly kept under 0.15%.
It features high strength and durability, with a tensile strength of 1250 – 1500 MPa, a yield strength of ≥1100 MPa, a hardness range of HV 360 – 430, and an elongation rate of 2 – 8%.
This material offers excellent elasticity recovery, high fatigue resistance, and superior anti-stress relaxation properties, ensuring stable mechanical performance over high-frequency usage.
It has a density of 8.25 g/cm³, an electrical conductivity of 20 – 28% IACS, thermal conductivity of approximately 105 W/m·K, and an elastic modulus of around 128 GPa.
It is widely applied in electronics (connectors, switches, battery contacts), aerospace/military (non-magnetic connectors, radar components), and precision instrumentation (diaphragms, bellows, sensors).
Yes, it has a smooth surface free of scratches or oxidation, making it highly suitable for electroplating and other surface treatment processes.