Cw104c Copper Strip
Grade Equivalents: EN CW104C / DIN 2.1285 / UNS C17500 / CuCo2Be / RWMA Class 3
Application Focus: High-Conductivity Electronic Springs, Resistance Welding Components, Fuse Clips, & Connectors
Executive Standards: EN 1652, ASTM B534 Specifications
Size Range: Thickness 0.05mm - 3.0mm, Width up to 300mm, Precision Slit Coils / Cut Strips
Temper Condition: Solution Annealed (TB00), Cold-Rolled, or Precipitation Hardened (TF00)
Core Purpose: High Electrical & Thermal Efficiency Combined with Mechanical Strength and Softening Resistance
Quality Assurance: ISO9001:2015, RoHS Compliant, EN 10204 3.1 Mill Certified
Description
CW104C Copper Strip | CuCo2Be High-Conductivity Alloy for Precision Electrical & Industrial Applications
Cw104c Copper Strip cobalt-beryllium copper alloy has a tensile strength of up to 850 MPa and 45-60% IACS electrical conductivity. This strip is created by Dongguan Jiaye Dingsheng Precision Casting & Forging Co., Ltd. which was formed in 1997 with more than 25 years expertise in copper alloys. It is available in a wide range of temper conditions, thicknesses from 0.05 mm to 3.0 mm and widths up to 300 mm. The company supplies the automotive, electronics, switchgear and resistance welding sectors with full traceability to EN 10204 3.1 Mill Test Certificate and conforms with EN 1652, ASTM B534, ISO 9001:2015 and RoHS.
What Is CW104C Copper Strip?
CuCo2Be, commonly known as Cw104c Copper Strip, is a precipitation-hardened copper-cobalt-beryllium alloy. This grade places more emphasis on thermal and electrical efficiency in addition to strong mechanical performance than high-strength C17200 beryllium copper.
2.40–2.70% cobalt and 0.40–0.70% beryllium make up the alloy matrix. After age, these components create a finely distributed beryllide structure that is resistant to microstructural deterioration under mechanical and thermal loads.
Standard brass and bronze alloys soften and fatigue in high-stress electrical situations, which is a major B2B procurement concern that it immediately solves. In thin-gauge components, CW104C preserves structural integrity without compromising electrical efficiency.
Chemical Composition
| Element | Content |
|---|---|
| Beryllium (Be) | 0.40 – 0.70% |
| Cobalt (Co) | 2.40 – 2.70% |
| Iron (Fe) | Max 0.10% |
| Copper (Cu) | Balance |
Technical Specifications
| Property | Value |
|---|---|
| Standard | DIN EN 1654, EN 1652, ASTM B534 |
| Grade Equivalents | EN CW104C / DIN 2.1285 / UNS C17500 / RWMA Class 3 |
| Thickness Range | 0.05mm – 3.0mm |
| Width | Up to 300mm |
| Temper Conditions | Solution Annealed (TB00), Cold-Rolled, Precipitation Hardened (TF00) |
| Hardness (Aged) | 92 – 100 HRB / 220 – 250 HB |
| Tensile Strength | 700 – 850 MPa |
| Yield Strength | 550 – 700 MPa |
| Electrical Conductivity | 45 – 60% IACS |
| Thermal Conductivity | 200 – 240 W/m·K |
| Softening Temperature | ≥ 500 °C |
Key Material Advantages
High Conductivity and Actual Power
When energy loss and overheating are an issue, CW104C's 45–60% IACS electrical conductivity and up to 240 W/m·K thermal conductivity much beat C17200 in thermal-electric efficiency.
Resistance to Thermal Softening
Hardness, conductivity, and mechanical strength are maintained throughout continuous high-temperature operation when the softening temperature reaches ≥500°C. This is crucial for heavy-duty contact assemblies and engine compartment electronics.
Resistance to Stress Relaxation
Cw104c Copper Strip maintains steady clamping force and contact pressure over long cycles in high-current or high-temperature settings, lowering maintenance frequency and enhancing system dependability.
Outstanding Soft Temper Formability
The strip may be pressed into intricate forms, such as coil springs, fuse clips, and switch contacts, in solution-annealed state (TB00), and then age-hardened at low temperatures to provide maximum mechanical performance.
Compliance with RWMA Class 3
It is suitable for heavy-duty welding electrode holders, shanks, and contact tip assemblies since it completely satisfies Resistance Welder Manufacturers' Association Class 3 requirements.
Application Areas
It is widely used for EV battery terminals and automotive high-current connectors to resist vibration and thermal load. It fits industrial switchgears and relays for long-cycle switching work. As mold cooling inserts, it accelerates heat dissipation to shorten molding cycle. Ultra-thin strip specs also support miniaturized electronic springs and fuse clip production.
Quality Control Process
All batches undergo laser dimensional calibration, mechanical performance testing, eddy current conductivity detection and hardness inspection. Surface and oxidation checks are completed for subsequent plating processing. Each shipment is equipped with EN 10204 3.1 test reports with complete component and performance data.
Customization & Supply Options
We support customized size, temper and surface finish. Stock products deliver in 3–5 days, with 24-hour quotation response. Complete customs and logistics documents are provided for global shipments.
FAQ
Q1: What is the difference between CW104C and C17200?
A1: CW104C has higher cobalt and lower beryllium content with better electrothermal conductivity, while C17200 has higher hardness for pure structural strength scenarios.
Q2: Is CW104C RoHS compliant?
A2: Solid finished products comply with RoHS and REACH standards, suitable for mainstream electronic equipment manufacturing.
Q3: Can the strip be welded and soldered?
A3: Yes. Conventional welding and soldering are available; surface cleaning is required to ensure joint stability.
Q4: What is its maximum working temperature?
A4: The softening temperature reaches 500°C, maintaining stable performance in long-term high-temperature working environments.
Q5: Which temper fits spring stamping?
A5: TB00 annealed temper is for forming, and low-temperature aging after processing can reach standard tensile strength.
Q6: How to store the strip?
A6: Store in low-humidity environment with anti-corrosion packaging to avoid surface oxidation before processing.
Contact Us
Send your size parameters and procurement demands to js01@jstongcai.com.cn. Our team will reply with professional technical solutions and formal quotes within 24 hours to supply qualified CW104C Copper Strip for your industrial projects.
