C17000 Beryllium Copper Spring Strip
Grade Equivalents: UNS C17000 / CuBe1.7 / Alloy 165 / EN CW100C
Application Focus: Formable Electronic Springs, Relay Blades, Switch Connectors, & Contact Fingers
Executive Standards: ASTM B194, ASTM B248, SAE J463, ISO 5182 Specifications
Size Range: Thickness 0.05mm - 2.5mm, Width up to 300mm, Precision Slit Coils / Cut Strips
Temper Condition: Annealed (TB00), Cold-Rolled Tempers (H02/H04), or Post-Aging Hardened
Core Purpose: Enhanced Cold Formability Combined with High Spring Resilience and Superior Conductivity
Quality Assurance: ISO9001:2015, RoHS Compliant, MTC 3.1 Certified
Description
C17000 Beryllium Copper Spring Strip — High-Formability Precision Spring Material for Demanding Electronic and Industrial Applications
Our C17000 Beryllium Copper Spring Strip is a professional UNS C17000 copper-beryllium alloy strip with beryllium concentration of 1.60-1.85% produced according to ASTM B194. The material displays continuous performance during age treatment, retaining 22–28% IACS conductivity and attaining up to 1240 MPa tensile strength compared to standard phosphor bronze and stainless steel spring materials. It is offered in sliced coil or cut to length strip form and caters for thicknesses of 0.05 to 2.5 mm and widths up to 300 mm. With over 25 years manufacturing expertise, we can provide full EN 10204 3.1 test certifications for each batch and can also provide stock within 3-5 days.
What Is C17000 Beryllium Copper Spring Strip?
Compared to the more widely used C17200 grade, C17000 Beryllium Copper Spring Strip has a much lower beryllium content. This is a deliberate drop from around 1.9% to 1.60% to 1.85%. Engineers who design intricate stamped features, deep-drawn geometries, or tight-radius bends before heat treatment immediately benefit from the alloy's significantly increased ductility in the annealed or cold-rolled form. After two to three hours of precipitation hardening at around 315 °C, the strip material changes from a ductile, workable condition to a high-strength spring component.
The final result is a device that solves a long standing design difficulty, how to make complex geometry without breaking, and then have excellent spring performance in a controlled ageing cycle.
Key Technical Specifications
| Property | Value |
|---|---|
| Grade / UNS | C17000 / CuBe1.7 / Alloy 165 / EN CW100C |
| Beryllium Content | 1.60 – 1.85% |
| Co + Ni (min) | 0.20% |
| Base Metal | Copper (Balance) |
| Executive Standards | ASTM B194, ASTM B248, SAE J463, ISO 5182 |
| Thickness Range | 0.05 mm – 2.5 mm |
| Width Range | Up to 300 mm |
| Temper Conditions | TB00 (Annealed), H02/H04 (Cold-Rolled), TH04 (Age-Hardened) |
| Tensile Strength (Aged) | 1030 – 1240 MPa |
| Yield Strength (Aged) | 890 – 1140 MPa |
| Hardness (Aged) | 36 – 42 HRC / 330 – 390 HV |
| Electrical Conductivity | 22 – 28% IACS |
| Thermal Conductivity | 105 W/m·K |
| Magnetic Permeability | < 1.001 (Non-Magnetic) |
| Certifications | ISO 9001:2015, RoHS, REACH, MTC EN 10204 3.1 |
Performance Advantages
Better Cold Formability: Compared to C17200, this strip offers better cold formability with less springback and reduced scrap rates for complicated stamped objects.
Enhanced Conductivity: Reduces resistance loss to fit high-current electrical components.
Stress Relaxation Resistance: Maintains constant contact pressure under extended mechanical strain.
Non-Sparking & Non-Magnetic: Suitable for certain work environments.
Plating Adaptability: Gold, silver, nickel, and tin plating are excellent choices for accurate electrical assembly.
Typical Application Areas
The C17000 Beryllium Copper Spring Strip covers multiple industrial scenarios. It is used for aerospace vibration-resistant contacts and defense electronic components to adapt to cyclic load working conditions. It serves automotive EV battery terminals and charging connectors, resisting performance attenuation under high temperature and repeated mating. It applies to industrial relay blades and subsea oil and gas equipment parts with corrosion and embrittlement resistance. Ultra-thin specifications are also widely used in miniature precision electronic spring contacts and connector components.
Quality Control Process
All products adopt three-stage standardized inspection. ICP-OES chemical analysis verifies raw material composition and grain size to avoid forming defects. Rolling and heat treatment parameters are monitored in real time during production to stabilize material properties. Finished products pass hardness, tensile, dimensional and surface flaw detection. Every shipment is attached with complete EN 10204 3.1 reports with full batch traceability data.
Certificate
Customization and Supply Options
We support customisable thickness, width, and temper states and provide sliced coils and cut strips as requested. Mechanical and electrical properties may be changed to meet different application needs. Our team provides knowledgeable guidance on material selection and heat treatment. Custom orders are priced within 24 hours, and stock products allow for prompt delivery with complete customs documentation services.
Frequently Asked Questions
Q1: What distinguishes C17000 from C17200?
A1: With slightly lower beryllium content, C17000 offers superior pre-forming ductility for intricate geometries, with only a modest variation in post-aging hardness — making it suitable for spring components where formability is the priority.
Q2: Is it possible to weld the C17000 strip?
A2: Resistance and laser welding are supported. To recover integral mechanical qualities, surface cleaning and post-weld ageing treatment are advised.
Q3: Is the material RoHS compliant and safe to use?
A3: Solid finished strips meet RoHS and REACH standards. Only grinding and melting processes need standard industrial protective measures.
Q4: How to achieve standard hardness after forming?
A4: Stable hardness can be obtained by aging at 315°C for 2–3 hours, with parameters fine-tuned according to different material tempers.
Contact Us
Send your product specifications and technical demands for C17000 Beryllium Copper Spring Strip to js01@jstongcai.com.cn.
