Beryllium Copper Strip For Electrical Connectors
Grade Equivalents: UNS C17200 / CuBe2 / Alloy 25 / RWMA Class 4 / EN CW103C
Application Focus: High-Density Electrical Connectors, Terminal Blocks, Plug Pins, & Socket Spring Contacts
Executive Standards: ASTM B194, ASTM B248, SAE J463, ISO 5182 Specifications
Size Range: Thickness 0.05mm - 2.0mm, Width up to 300mm, Precision Slit Coils / Cut Strips
Temper Condition: Annealed (TB00), Pre-Rolled Tempers (H02/H04), or Precipitation Heat-Treated (TF00)
Core Purpose: High-Reliability Electrical Interconnection Combined with Ultimate Spring Resilience & Conductivity
Quality Assurance: ISO9001:2015, RoHS Compliant, MTC 3.1 Certified
Description
Beryllium Copper Strip For Electrical Connectors — C17200 Spring Contact Material with High-Cycle Mating Durability
Our practical C17200 alloy Beryllium Copper Strip for Electrical Connectors is made for connection pins, socket springs, and terminal contact stamping. The material can maintain a constant contact force across several plug-in cycles thanks to its tensile strength of 1110–1320 MPa, yield strength of over 950 MPa, and electrical conductivity of 22–25% IACS. It accommodates a maximum width of 300 mm and a thickness of 0.05–2.0 mm and is available in annealed, pre-rolled, and heat-treated tempers. Each product includes EN 10204 3.1 test certificates for full batch traceability, ISO 9001 certification, and compliance with RoHS requirements.
What Is Beryllium Copper Strip For Electrical Connectors?
With copper as the foundation material, this copper-beryllium strip (called UNS C17200, CuBe2, Alloy 25, and EN CW103C) comprises 1.80–2.00% beryllium and at least 0.20% Co+Ni. It facilitates flexible shaping when annealed and may be heated to 315–325°C for two to three hours to get 36–42 HRC hardness. For long-term steady operation, Beryllium Copper Strip for Electrical Connectors, in contrast to brass and phosphor bronze, maintains consistent contact pressure during vibration, temperature change, and continuous current load.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Grade / Standard | C17200 / ASTM B194 / ASTM B248 |
| Beryllium Content | 1.80 – 2.00% |
| Co + Ni Minimum | 0.20% |
| Thickness Range | 0.05 mm – 2.0 mm |
| Width Range | Up to 300 mm |
| Available Tempers | TB00 (Annealed), H02/H04, TF00 (Aged) |
| Tensile Strength (Aged) | 1,110 – 1,320 MPa |
| Yield Strength (Aged) | 950 – 1,150 MPa |
| Hardness (Aged) | 36 – 42 HRC / 350 – 420 HV |
| Electrical Conductivity | 22 – 25% IACS |
| Thermal Conductivity | 105 W/m·K |
| Modulus of Elasticity | 131 GPa |
| Magnetic Permeability | < 1.001 (Non-magnetic) |
| Compliance | RoHS, REACH |
| Certification | ISO 9001, MTC 3.1 |
Product Forms & Customization Options
We supply precision slit coils for progressive die stamping and cut-to-length strips for batch forming processes. The thickness tolerance can be controlled within ±0.005mm. All dimensions, temper states and hardness parameters can be adjusted according to actual connector design demands. Our technical team provides material selection, heat treatment optimization and technical matching support.
Application Scenarios
This information is applicable to several domains of electronic connections:
- EV battery connections and charging ports can withstand continuous current and vibration.
- Aerospace and Defense Multi-Pin Connectors: Suitable for vacuum environments and temperature swings between -55°C and +150°C.
- Micro sockets and 5G communication backplane connections use ultra-thin 0.05–0.2 mm strips.
- Industrial terminal blocks and plug pins guard against deformation caused by repeated mating.
Why This Material Outperforms Standard Alternatives
Stable Elastic Recovery: To prevent loose connection failure, the material recovers gradually following deformation when its elastic modulus and yield strength are stable.
High-Temperature Stability: Adapts to the operating circumstances of automotive electronics by maintaining a steady contact force after extended high-temperature operation.
Plating Compatibility: To guaranty a consistent coating result, the smooth surface is compatible with gold, silver, nickel, and tin plating procedures.
Non-Magnetic: Prevents signal interference for high-frequency and precision electronic devices.
Quality Control Process
Complete pre-detection processes are applied to all completed materials:
- Alloy composition is confirmed by OES Chemical Analysis.
- Hardness testing: Verifies the impact of age therapy.
- Conductivity data is calibrated by eddy current testing.
- Dimensional homogeneity is ensured using laser detection.
- Tests for Surface Finish and High-Temperature Stress Relaxation: Ensure usefulness.
Complete EN 10204 3.1 certification documentation are given with every batch.
How to Form and Process This Strip Correctly
Processing and forming shall be completed under TB00 annealed or H02/H04 pre-rolled status. Forming after full aging treatment may cause cracking due to reduced ductility. Standard processing follows forming first and aging hardening second, with 315°C–325°C constant temperature treatment to achieve full mechanical properties. Store the strips in dry and low-humidity environments with anti-tarnish packaging to keep surface cleanliness.
FAQ
Q1: Why choose beryllium copper over phosphor bronze for connectors?
A1: It has higher yield strength and better high-temperature stress relaxation resistance, delivering more stable performance for high-cycle and thermally variable working scenarios.
Q2: Is the material RoHS and REACH compliant?
A2: Solid finished beryllium copper strips meet RoHS and REACH standards without safety hazards in daily use.
Q3: Can the strip be processed after aging hardening?
A3: It is not recommended. Hardened material has low ductility and is prone to cracking; forming must be done before aging treatment.
Q4: How does precipitation hardening improve material performance?
A4: Constant-temperature aging promotes internal element precipitation, improving the material's hardness and conductivity to stabilize overall performance.
Q5: What thickness fits micro connector production?
A5: 0.05–0.2 mm ultra-thin strips are suitable for 5G and micro connectors, with precision tolerance available for miniaturized part processing.
Contact Us
If you are looking for stable and durable Beryllium Copper Strip For Electrical Connectors, please send your technical drawings and procurement demands to js01@jstongcai.com.cn. Our team will provide accurate quotations and professional technical support within 24 hours.
