CuNi3SiCr (CW112C / C18000 / 2.0855 / RWMA Class III) is a high-performance copper alloy based on nickel–silicon and strengthened with chromium. Combining high electrical conductivity with exceptional mechanical strength, this alloy offers a safe, environmentally friendly, and beryllium-free solution for industries seeking advanced performance materials.
After heat treatment, the alloy attains high hardness, superior wear resistance, and oxidation stability, making CuNi3SiCr an excellent choice for precision-critical applications such as resistance welding electrodes, mold components, automotive connectors, and electronic contact systems.
Technical Advantages:
- Medium-to-high electrical conductivity (40–60% IACS)
- High hardness achievable through heat treatment (typically HRc 38–44)
- Excellent resistance to wear, friction, and impact
- Dimensional stability and oxidation resistance at elevated temperatures
- Non-sparking and anti-magnetic characteristics
- Beryllium-free, environmentally friendly, and safe alloy
Primary Application Areas:
Resistance Welding: Electrodes, pressure tips, welding contact components
Tooling & Moldmaking: High-speed mold elements, core tips, hot runner components
Electronics & Automotive: Connectors, springs, conductive components exposed to elevated heat
Defense & Aerospace: Components operating under high thermal stress
Energy Systems: Switching and transfer components, high-voltage contacts
Quality Assurance & Standards:
CuNi3SiCr complies fully with the following international standards:
EN: CW112C
ASTM / UNS: C18000
DIN: 2.0855
RWMA: Class III
All products are supplied with chemical composition analyses, hardness and conductivity test results, and microstructure inspections, ensuring complete traceability and certification. The alloy meets RoHS and REACH environmental requirements.
CHEMICAL COMPOSITION
| Cu | Ni | Si | Cr |
|---|---|---|---|
| % rem | %1.8-3 | % 0.4-0.8 | % 0.2-0.6 |
AVALIABLE STANDART
| EN | ASTM | AMS | DIN | RWMA |
|---|---|---|---|---|
| CW112C | C18000 | 2.0855 | CLASS III |
APPLICATIONS
- Resistance Welding Electrodes
- Seam Weldings Wheels
- Plunger Tips for Aluminium High Pressure Die-Casting
- Molds for Low Gravity Die-Casting
- Circuit Breaker Switches
- Electrical Components
- Injection Nozzles
- Continuous Casting Molds (ferrous and non-ferrous metal)
- Rotor Bars and Circuit Rings
- Circuit Breaker Switches
- Electrical Components
- Rotor Wedges in Generators
SUPPLIED FORM
- Rings
- Plates
- Discs
- Tubes
- Round bars
- Square bars
- Rectangular bars
- Hexagon bars
- Custom shapes are available upon reques
PHYSICAL PROPERTIES
| Density | Specific Heat | Electrical Conductivity | Electrical Conductivity (I.A.C.S.) | Thermal Conductivity |
|---|---|---|---|---|
| 8.7 g/mm3 | 0.42 J/g.K | min. 25 MS/m | min. 43% | 208 W/m.K |
MECHANICAL PROPERTIES
| MATERIAL CONDITION | Tensile Strenght Rm N/mm² | Yield Strengh Rp 0,2 N/mm² | Elongation (A5) % | Hardness (Brinell) HB30 |
|---|---|---|---|---|
| EXTRUDED | min. 600 | min. 450 | min. 6 | min. 180 |
| FORGED | min. 550 | min. 400 | min. 6 | min. 180 |
1. Electrical and Electronics Industry
Resistance welding electrodes (especially for high-cycle production lines)
Connectors, contact surfaces, and terminals
High-frequency signal transmission components
2. High-Pressure Aluminum Casting Applications
Piston heads used in high-pressure aluminum die-casting
2.1 Low-Pressure Mold Casting
Components produced from brass such as faucets, water meter bodies, etc.
3. Defense and Aerospace Industry
Radar, sensor, and signal system components
Non-magnetic, high-strength mechanical parts
In-aircraft electrical hardware components
4. Mold and Tooling Industry
Punches, die inserts, and wear-resistant tooling parts
Heat-conductive core elements in plastic injection molds
Electrodes and components operating under high pressure
5. Energy and Power Systems
Current-carrying movable contact surfaces
Connection parts exposed to thermal and mechanical loads
