Beryllium Copper Wire Supplier
Beryllium Copper Wires
BERYLLIUM COPPER WIRE
Beryllium Copper Wire — High Strength, High Conductivity, Precision Drawn
Domadia is a leading global supplier of Beryllium Copper Wire, stocking UNS C17200 (Alloy 25) in diameters ranging from 0.1mm to 4.0mm, supplied on convenient 1kg spools for consistent, tangle-free dispensing in production environments. Our BeCu wire combines exceptional tensile strength with outstanding electrical conductivity, spring properties, and corrosion resistance — making it the preferred choice for precision components in aerospace, electronics, telecommunications, automotive, and defence applications.
All wire is sourced from certified manufacturers, drawn to tight dimensional tolerances, and supplied with full material certifications — ready for immediate use in your production or R&D process.
Beryllium Copper Wire — At a Glance
| Parameter | Details |
|---|---|
| Alloy | Beryllium Copper Alloy 25 |
| UNS Designation | UNS C17200 |
| Beryllium Content | 1.8% – 2.0% |
| Diameter Range | 0.1mm to 4.0mm |
| Spool Weight | 1 kg per spool |
| Temper | Mill hardened / Solution annealed (as required) |
| Surface Finish | Bright drawn |
| Certifications | ASTM B197, AMS 4725, EN, DIN, and others |
| Key Properties | High strength, spring quality, conductivity, non-sparking |
| Applications | Springs, contacts, connectors, probes, EDM, aerospace |
International Standards & Specifications
Domadia’s Beryllium Copper Wire is manufactured and supplied in compliance with the following international standards:
- UNS: C17200 (Alloy 25), C17300
- ASTM: ASTM B197 — Standard Specification for Beryllium Copper Wire
- AMS: AMS 4725
- SAE: SAE J461, SAE J463
- DIN: DIN 2.1247
- EN / CEN: CW101C to EN
- Other designations: CuBe2, QBe2, BrB2, ASTM CDA 172, RWMA Class 4
Mill test certificates, chemical composition reports, and mechanical property certifications are available with every order.
Key Material Properties of Beryllium Copper Wire (UNS C17200)
Mechanical Properties
| Property | Solution Annealed | Mill Hardened (HM / HT) |
|---|---|---|
| Tensile Strength | 410–590 MPa | 1,000–1,400 MPa |
| Yield Strength (0.2%) | 170–310 MPa | 900–1,250 MPa |
| Elongation | 35–60% | 2–8% |
| Hardness (HRB/HRC) | 45–78 HRB | 36–42 HRC |
| Elastic Modulus | ~128 GPa | ~128 GPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.26 g/cm³ |
| Electrical Conductivity | 22–28% IACS |
| Thermal Conductivity | 105–130 W/m·K |
| Coefficient of Thermal Expansion | 17.8 µm/m·°C |
| Melting Point | ~865°C – 980°C |
| Magnetic Properties | Non-magnetic |
| Spark Properties | Non-sparking |
Available Sizes — Beryllium Copper Wire Diameter Chart
| Diameter (mm) | Diameter (inches) | Typical Use |
|---|---|---|
| 0.10 mm | 0.004″ | Fine winding, microelectronics |
| 0.20 mm | 0.008″ | Precision springs, sensor probes |
| 0.30 mm | 0.012″ | Contact springs, relay components |
| 0.50 mm | 0.020″ | EDM wire, fine connectors |
| 0.75 mm | 0.030″ | Switch contacts, electronic springs |
| 1.00 mm | 0.039″ | General spring wire, connectors |
| 1.50 mm | 0.059″ | Structural springs, probe pins |
| 2.00 mm | 0.079″ | Heavy-duty springs, aerospace |
| 2.50 mm | 0.098″ | Industrial connectors, tooling |
| 3.00 mm | 0.118″ | Structural, mould components |
| 4.00 mm | 0.157″ | Heavy gauge, industrial use |
Intermediate sizes available on request. All diameters supplied on 1kg spools with clear labelling of alloy, diameter, temper, and heat number.
Technical Details
Alloy Chemistry — UNS C17200
| Element | Composition (%) |
|---|---|
| Beryllium (Be) | 1.80 – 2.00 |
| Cobalt + Nickel (Co + Ni) | 0.20 – 0.60 |
| Copper (Cu) | Balance |
| Lead (Pb) max | 0.02 |
| Iron (Fe) max | 0.15 |
Temper Conditions Available
- A (Solution Annealed): Soft, formable condition for complex forming operations prior to age hardening
- HM (Mill Hardened — Medium): Partially hardened for applications requiring moderate strength and formability
- HT (Mill Hardened — Full Hard): Maximum strength condition for direct use in springs and contacts without further heat treatment
- AT (Age Hardened from Annealed): Peak strength achieved through precipitation hardening
Age Hardening (Precipitation Hardening) BeCu wire in the annealed condition can be age hardened at 315°C–340°C for 2–3 hours to achieve maximum tensile strength and hardness. This process is performed after forming to lock in the component geometry while developing full mechanical properties.
Wire Drawing Process Our Beryllium Copper Wire is precision cold-drawn through tungsten carbide dies to achieve tight diameter tolerances (typically ±0.005mm on fine sizes), excellent surface finish, and consistent mechanical properties throughout the spool length — critical for automated assembly processes.
Applications of Beryllium Copper Wire
Electronic Springs & Contacts BeCu wire is the gold standard for precision electronic springs, contact fingers, and leaf springs in connectors, switches, and relay assemblies. Its combination of high spring-back, fatigue resistance, and electrical conductivity ensures long service life in high-cycle switching applications.
Connector & Terminal Manufacturing Beryllium Copper wire is drawn, stamped, and formed into electrical connectors and terminals for automotive, consumer electronics, and industrial control systems — where contact reliability over millions of cycles is critical.
Aerospace & Defence Components Used in aircraft avionics connectors, aerospace relay springs, guidance system contacts, and military-grade connectors that must withstand vibration, temperature extremes, and demanding mechanical cycling.
EDM (Electrical Discharge Machining) Wire BeCu wire is used as an electrode material in EDM operations due to its excellent electrical conductivity, consistent diameter, and thermal properties — enabling precision machining of hardened tool steels and exotic alloys.
Probe Pins & Test Sockets Beryllium Copper is the preferred material for semiconductor test probe pins and IC socket contacts, where spring force consistency, electrical performance, and wear resistance over millions of insertions are essential.
Medical Devices & Instruments BeCu wire is used in precision surgical instruments, dental tools, and diagnostic equipment where non-magnetic, corrosion-resistant, high-strength wire is required.
Telecommunications Used in SIM card contacts, antenna spring contacts, RF connectors, and precision coiled springs for telecommunications hardware — where consistent contact force and signal integrity are critical.
Non-Sparking Safety Tools Wire forms and components fabricated from BeCu are used in hazardous and explosive environments (oil & gas, mining, chemical plants) where non-sparking tooling and hardware are mandated by safety regulations.
Precision Winding & Coil Springs BeCu wire is wound into precision coil springs for instrumentation, cameras, medical devices, and defence systems — valued for fatigue resistance and predictable spring characteristics across temperature ranges.
End Use Industries
- Aerospace & Avionics
- Defence & Military Systems
- Automotive Electronics & EVs
- Consumer & Industrial Electronics
- Semiconductor & PCB Testing
- Telecommunications & RF Systems
- Oil, Gas & Mining (Non-Sparking)
- Medical Devices & Diagnostics
- Precision Instrumentation
- Tooling & Mould Making
Why Choose Domadia for Beryllium Copper Wire?
Comprehensive Size Range — 0.1mm to 4.0mm We stock one of the widest diameter ranges available from a single supplier in India — from ultra-fine 0.1mm wire for microelectronics to 4.0mm heavy gauge wire for industrial applications — eliminating the need to source different sizes from multiple vendors.
Convenient 1kg Spool Packaging All wire is supplied on clearly labelled 1kg spools, ensuring tangle-free dispensing, easy inventory management, and efficient use in automated winding and forming operations. Custom spool weights available for high-volume orders.
Certified to International Standards Every spool is backed by mill test certificates confirming compliance with ASTM B197, AMS 4725, UNS C17200, DIN 2.1247, and other applicable standards — providing the traceability required by aerospace, defence, and regulated manufacturing customers.
Tight Dimensional Tolerances Our wire is precision drawn to tight diameter tolerances — critical for automated contact stamping, coil winding, and probe pin manufacturing where dimensional consistency directly affects component performance.
Multiple Temper Conditions We supply BeCu wire in solution annealed, mill hardened medium, and mill hardened full hard tempers — giving engineers the flexibility to choose the right condition for their forming and performance requirements.
Expert Technical Support Domadia’s materials team advises on alloy selection, temper choice, age hardening parameters, and forming guidelines — helping customers optimise their processes from prototype through to production.
Fast Domestic & International Shipping With established logistics across India and global export capability, Domadia delivers reliably to customers in Mumbai, Delhi, Bangalore, Chennai, Pune, Hyderabad, and internationally across Asia, the Middle East, and Europe.
Trusted Beryllium Copper Specialist Beryllium Copper is our core business. Beyond wire, Domadia supplies BeCu rods, plates, sheets, foil, strips, and EMI components — making us your single-source partner for all Beryllium Copper requirements.
Frequently Asked Questions
Q1. What diameter range is available for Beryllium Copper Wire from Domadia? Domadia stocks Beryllium Copper Wire in diameters from 0.1mm to 4.0mm. All sizes are available in UNS C17200 (Alloy 25) and supplied on 1kg spools. Intermediate sizes and custom diameters are available on request — contact our team with your specification.
Q2. What international standards does your Beryllium Copper Wire comply with? Our wire complies with ASTM B197, AMS 4725, UNS C17200, SAE J461, SAE J463, DIN 2.1247, and CW101C (EN), among others. Full mill test certificates and material certifications are supplied with every order.
Q3. What temper conditions are available? We supply BeCu wire in solution annealed (A), mill hardened medium (HM), and mill hardened full hard (HT) tempers. The right temper depends on whether you intend to form the wire before or after hardening — our technical team can advise based on your application.
Q4. Can Beryllium Copper Wire be further heat treated after purchase? Yes. Wire supplied in the solution annealed condition can be age hardened (precipitation hardened) at approximately 315–340°C for 2–3 hours after forming, to achieve maximum tensile strength of up to 1,400 MPa. Mill hardened wire is ready to use directly without further heat treatment.
Q5. Why is Beryllium Copper preferred over phosphor bronze or stainless steel wire for springs and contacts? BeCu offers significantly higher tensile strength than phosphor bronze with better electrical conductivity, and outperforms stainless steel in conductivity and non-magnetic properties. Its fatigue resistance and spring-back characteristics are also superior — making it the preferred choice for high-cycle, high-performance contact and spring applications.
Q6. Is Beryllium Copper Wire safe to handle? Solid BeCu wire in spool form is safe to handle with standard precautions. Beryllium hazards primarily arise from dust or fumes generated during cutting, grinding, or machining. Domadia supplies Safety Data Sheets (SDS) with all shipments, and customers should follow applicable occupational health guidelines when processing BeCu wire.
Q7. What is the minimum order quantity? Domadia supplies from a single 1kg spool, making our wire accessible for prototyping, R&D, and small-batch production as well as large-volume manufacturing orders. Contact us for volume pricing on multi-spool orders.
Q8. Can you supply Beryllium Copper Wire for EDM applications? Yes. BeCu wire is used in EDM operations as an electrode material. We can advise on the appropriate diameter and temper for your specific EDM machine and application requirements.
Q9. Do you supply internationally? Yes. Domadia exports Beryllium Copper Wire to customers across Asia, the Middle East, Europe, and beyond. We manage all necessary export documentation, certifications, and logistics for international orders.
Q10. How do I get a quote or place an order? Contact Domadia via email, WhatsApp, or phone with your required diameter, temper, quantity, and any certification requirements. We respond promptly with pricing, availability, and lead time.
Contact Domadia — Beryllium Copper Wire Enquiries
Ready to order or need technical advice? Our Beryllium Copper specialists are available to assist with product selection, specifications, and pricing.
📧 Email:sales@domadia.com 💬 WhatsApp:Chat with us on WhatsApp 📞 Call / WhatsApp:+91-95940 66275
We typically respond within a few business hours. For urgent requirements, WhatsApp or phone is recommended for the fastest response.
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