Beryllium Copper Contact Strip
Grade Equivalents: UNS C17200 / CuBe2 / Alloy 25 / RWMA Class 4 / EN CW103C
Application Focus: Electronic Switch Contacts, Spring Fingers, EMI/RFI Shielding Gaskets, & Relay Blades
Executive Standards: ASTM B194, ASTM B248, SAE J463, ISO 5182 Specifications
Size Range: Thickness 0.05mm - 1.5mm, Width up to 300mm, Precision Slit Coils & Cut Strips
Temper Condition: Annealed (TB00), Pre-Tempered (H02/H04), or Precipitation Heat-Treated (TF00)
Core Purpose: Low Electrical Contact Resistance Combined with Ultimate Elastic Spring Resilience
Quality Assurance: ISO9001:2015, RoHS Compliant, MTC 3.1 Certified
Description
Beryllium Copper Contact Strip for Electronic Contacts & EMI Shielding — Precision-Rolled, Spring-Ready Solution
The precision-rolled alloy strip known as Beryllium Copper Contact Strip (UNS C17200 / CuBe2 / Alloy 25) is intended for a variety of electrical contact and spring applications. With more than 25 years of expertise in metallurgical manufacturing, Dongguan Jiaye Dingsheng Precision Casting & Forging Co., Ltd. has focused on producing beryllium copper since 1997. The strip has electrical conductivity of 22–25% IACS, tensile strength of 1110–1320 MPa, and widths up to 300 mm. Its thicknesses range from 0.05 mm to 1.5 mm. Supported by ISO 9001 and RoHS certification, it is available in TB00 annealed, H02/H04 pre-tempered, and TF00 completely aged states. Each batch is given an EN 10204 3.1 MTC.
What Is Beryllium Copper Contact Strip?
Beryllium Copper Contact Strip is a thin-gauge precision strip composed of C17200 alloy with at least 0.20% cobalt and nickel and 1.80–2.00% beryllium. It may be stamped and treated in a soft or half-hard state. After precipitation heat treatment, it achieves 36–42 HRC hardness and 950–1180 MPa yield strength. This processing feature makes it appropriate for applications requiring spring memory, low contact resistance, and fatigue resistance, such as electronic switch contacts, relay blades, EMI/RFI shielding gaskets, and spring fingers.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Grade | UNS C17200 / CuBe2 / Alloy 25 / EN CW103C |
| Beryllium Content | 1.80 – 2.00% |
| Co + Ni (min) | 0.20% |
| Thickness Range | 0.05mm – 1.5mm |
| Width | Up to 300mm |
| Temper Options | TB00 (Annealed), H02/H04 (Pre-Tempered), TF00 (Aged) |
| Tensile Strength (Aged) | 1110 – 1320 MPa |
| Yield Strength (Aged) | 950 – 1180 MPa |
| Hardness (Aged) | 36 – 42 HRC / 350 – 420 HV |
| Electrical Conductivity | 22 – 25% IACS |
| Thermal Conductivity | 105 W/m·K |
| Executive Standards | ASTM B194, ASTM B248, SAE J463, ISO 5182 |
| Compliance | ISO 9001:2015, RoHS, REACH, EN 10204 3.1 MTC |
Performance Advantages
The strip maintains stable low contact resistance during repeated mating, stabilizing signal transmission for precision switches, connectors and relays. With yield strength up to 1180 MPa, it keeps steady contact pressure without permanent deformation during long-term cyclic use. It resists mechanical and thermal relaxation under 200°C working environment, avoiding connection instability caused by declining clamping force.
With magnetic permeability below 1.001, it adapts to precision instruments and communication equipment that require zero magnetic interference. Its stable conductivity and spring back force can form low-impedance contact structures, blocking electromagnetic leakage for EMI/RFI shielding scenarios.
Application Scenarios
It is widely used in multiple industries: aerospace and defense avionic shielding components adapting to extreme temperature and pressure changes; 5G communication base stations and high-speed router high-frequency contact parts; automotive EV BMS and inverter vibration-resistant conductive contacts; consumer and industrial electronic relays, microswitches and circuit breaker components.
Formability & Heat Treatment Process
The annealed TB00 strip supports tight-radius bending and complex stamping without cracking. Formed parts can be heated at 315°C for 2–3 hours for precipitation hardening, with no dimensional distortion after treatment. Pre-tempered H02/H04 and fully hardened TF00 finished strips are also available to meet diverse processing and installation needs.
Quality Control & Certification
All products adopt three-stage inspection including incoming material check, in-process monitoring and finished product verification. We conduct OES composition analysis, hardness testing and dimensional calibration for each batch. Complete EN 10204 3.1 test reports and full production traceability are provided to ensure product consistency.
Certificate
Custom Dimensions & Supply Options
Standard products are in stock and deliverable within 3–5 days. We support customized thickness, width, hardness and conductivity parameters, as well as gold, tin and nickel surface plating. Professional alloy selection and heat treatment technical consultation are also available. Quotations will be issued within 24 hours, with sea and air freight services and complete customs documents.
FAQ
Q1: Why use this beryllium copper strip for shielding gaskets instead of stainless steel?
A1: Stainless steel has low electrical conductivity, while C17200 strip features higher conductivity and fatigue resistance, fitting long-term cyclic working shielding scenarios.
Q2: What temper is suitable for stamping complex contact parts?
A2: Choose TB00 annealed temper for stamping, then conduct 315°C aging treatment to reach standard hardness and spring performance.
Q3: How does aging hardening improve contact stability?
A3: Aging treatment increases yield strength, enabling the strip to maintain stable spring tension and contact force during millions of mating cycles.
Q4: Does the product meet RoHS compliance?
A4: Finished solid C17200 strip conforms to RoHS and REACH regulations, with official compliance documents provided.
Q5: What plating options are available for different contact scenarios?
A5: Gold plating for signal contacts, tin plating for solderable connections, and nickel plating as diffusion barrier for high-temperature applications.
Q6: What documents can be provided for orders?
A6: Each order is equipped with 3.1 MTC test reports, covering composition, hardness and conductivity data, together with compliance certificates.
Contact Us
Send your detailed product specifications and drawings forBeryllium Copper Contact Strip to our team via js01@jstongcai.com.cn. We will provide professional and detailed quotation solutions within 24 hours.
