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C17200 High Elastic Beryllium Copper Foil - China Suppliers & Factory with Precision Thickness Control
Chemical Component
| Element | Content |
| Beryllium (Be) | 1.8 – 2.0 |
| Cobalt + Nickel (Co+Ni) | ≥0.2 |
| Copper (Cu) | Remaining amount |
| Impurities | ≤0.15 |
Mechanical Properties
| Project | Values |
| Tensile strength | 1250 – 1500 MPa |
| Yield strength | ≥1100 MPa |
| Hardness | HV 360 – 430 |
| Elongation | 2 – 8% |
Physical Properties
| Project | Values |
| Density | 8.25 g/cm³ |
| Electrical conductivity | 20 – 28% IACS |
| Thermal conductivity | ≈105 W/m·K |
| Elastic modulus | ≈128 GPa |
Product Features
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High elasticity recovery ability, suitable for precision spring clips
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Excellent anti-stress relaxation performance, stable over a long period
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Strong anti-fatigue performance, suitable for high-frequency usage environments
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Smooth surface, without scratches or oxidation
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Can undergo electroplating processing
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Excellent processing performance
Typical Application Fields
1 Electronics
- 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
2 Aerospace / Military
- Non-magnetic connectors, fatigue-resistant and highly reliable spring elements
- Satellites, radar high-frequency contact components
3 Precision Machinery / Instruments
- Diaphragms, bellows, pressure gauge elastic elements
- Sensor elastic bodies, micro-displacement mechanisms
Frequently Asked Questions (FAQ)
Q: What is the chemical composition of this Beryllium Copper alloy?
A: The alloy consists of 1.8% to 2.0% Beryllium (Be), at least 0.2% Cobalt + Nickel (Co+Ni), with Copper (Cu) making up the remaining balance. Total impurities are strictly controlled at 0.15% or less.
Q: What mechanical properties make this material suitable for demanding applications?
A: It features high tensile strength (1250 – 1500 MPa), high yield strength (≥1100 MPa), a hardness range of HV 360 – 430, and an elongation rate of 2 – 8%, providing an excellent balance of strength and ductility.
Q: How does its electrical and thermal conductivity perform?
A: The material offers an electrical conductivity of 20 – 28% IACS and a thermal conductivity of approximately 105 W/m·K, making it highly efficient for electronic connectors and switches.
Q: Why is this alloy preferred for high-frequency switch and relay applications?
A: Thanks to its high elasticity recovery, excellent anti-stress relaxation, and superior fatigue resistance, it maintains stable mechanical performance over extended periods in high-frequency environments.
Q: Can this Beryllium Copper alloy undergo surface treatments?
A: Yes. The material features a smooth, scratch-free, and oxidation-free surface that is perfectly suited for electroplating and other post-processing treatments.