Products Description
Becu Copper Spring Contacts are essentially precision elastic stampings. Based on a beryllium copper alloy, they achieve a balance of elasticity and mechanical strength that is difficult to attain with ordinary copper alloys through stamping and aging treatment. Therefore, they are widely used in applications requiring repeated operation, long-term conductivity, and highly reliable contact.
For relays, contactors, microswitches, and precision electrical control equipment, beryllium copper stampings often directly determine product lifespan, operational stability, and electrical performance.
Product Properties and Characteristics
Extremely High Mechanical Strength and Hardness: After solution treatment and aging, BeCu stamping's tensile strength (Rm) can stably reach 1100~1400 MPa, yield strength (Rp0.2) is between 1000~1200 MPa, and Rockwell hardness (HRC) can reach 38~42. These parameters make it less prone to permanent plastic deformation under high stress.
Excellent Elasticity and Fatigue Limit: The elastic modulus (E) is approximately 128 GPa, about 30% higher than that of traditional phosphor bronze. Under alternating loads, beryllium alloy stamping's fatigue life can typically reach >10⁷ cycles, with minimal elastic hysteresis, ensuring that the relay moving spring maintains its initial contact pressure after millions of cycles.
Excellent Electrical and Thermal Conductivity Balance: Even at peak strength, Beryllium Spring for Relay's electrical conductivity remains at 22%~25% IACS, and its thermal conductivity is approximately 10⁵ W/(m·K). This ensures that the contact spring maintains low contact resistance and dissipates Joule heat rapidly when a large current passes through it.
Detailed display
Microstructure Observation
Under a metallographic microscope, beryllium copper grains are fine and uniform (ASTM 5-8 grade), exhibiting isotropic and non-directional properties, ensuring consistent elastic performance for beryllium alloy stamping.
Fatigue Test Comparison
Compared to phosphor bronze, this BeCu stamping shows a deformation of only 0.02mm after 10⁶ cycles, while phosphor bronze shows a deformation of 0.15mm, indicating significant elastic degradation.
Salt Spray Test Report
Cu Beryllium Spring Contacts passed a 96-hour neutral salt spray (NSS) test with no corrosion spots on the surface, meeting the requirements for marine environment applications.
Manufacturing Capabilities & Strengths
High-Speed Progressive Stamping Matrices
We are equipped with a fully automated precision stamping line. All dies use imported integral tungsten carbide (hard alloy) bushings and ultra-precision polished punches. The machining tolerance can be stably controlled within ±0.005mm, perfectly adapting to the mass production needs of various oddly shaped and bent Cu Beryllium Spring Contacts.
Atmosphere-Controlled Vacuum Age-Hardening
After stamping, the Beryllium Springs for Relay are sent to a fully enclosed vacuum aging heat treatment system. By controlling the temperature rise curve and holding time, local residual stress in various parts of the component can be perfectly eliminated, ensuring a consistent springback angle height.
Inline 3D Optical Inspection Arrays
The stamping production line integrates a high-resolution AOI vision measurement module at the end, which can scan the important opening degree of the beryllium alloy stamping and the micro-flatness of the contact surface in real time, and automatically remove any defective parts with extremely small geometric distortions in high-speed production.
contact us
We understand that the Becu Copper Spring Contacts are crucial to your project. For technical specifications, sample requests, or engineering consultations, please contact our engineering team directly using the contact information below. We will provide you with professional technical answers and timely project support.
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