CuCr1 (CW105C / C18200 / 2.1291 / Class II) is a high-performance copper alloy alloyed with chromium. With its excellent electrical and thermal conductivity combined with mechanical strength that is maintained at elevated temperatures, it is an ideal choice especially for resistance welding technologies and heavy-duty industrial applications.
After heat treatment, the alloy reaches RWMA Class II properties, offering long service life, low deformation, and high wear resistance, thereby increasing production efficiency. This optimized balance of conductivity and hardness ensures reliable performance in industrial environments.
Technical Advantages:
- High electrical and thermal conductivity (80–90% IACS)
- Increased hardness and strength after heat treatment
- Dimensional stability at high temperatures
- Resistance to wear and erosion
- Long service life and low maintenance requirement
- Easy machinability and good weldability
Main Application Areas:
Resistance Welding: Welding electrodes, welding tips, pressure heads
Electrical Industry: High-current carrying busbars, connector components
Mold Making: Plastic mold cores, hot runner system components
Energy & Automotive: Current-carrying components, motor and generator parts
Heavy Industry: Press components, contact plates, rail system parts
Quality Assurance and Standards:
CuCr1 alloy is manufactured in full compliance with CW105C (EN), C18200 (UNS), 2.1291 (DIN), and RWMA Class II standards.
All products are delivered with material certificates, chemical analysis reports, and mechanical test documents.
Quality control and complete traceability are ensured throughout the entire production process.
CHEMICAL COMPOSITION
| Cu | Cr |
|---|---|
| % rem | % 0.5-1.2 |
AVALIABLE STANDART
| EN | ASTM | AMS | DIN | RWMA |
|---|---|---|---|---|
| CW105C | C18200 | 2.1291 | CLASS II |
APPLICATIONS
- Resistance Welding Electrodes
- Seam Weldings Wheels
- Continuous Casting Molds (ferrous and non-ferrous metal)
- Rotor Bars and Circuit Rings
- Circuit Breaker Switches
- Electrical Components
SUPPLIED FORM
- Rings
- Plate
- Disc
- Centrifugals
- Round bar
- Square bar
- Rectangular bar
- Hexagon bar
- Custom shapes are available upon reques
PHYSICAL PROPERTIES
| Density | Specific Heat | Electrical Conductivity | Electrical Conductivity (I.A.C.S.) | Thermal Conductivity |
|---|---|---|---|---|
| 8.9 g/mm3 | 0.38 J/g.K | min. 43 MS/m | min. 75% | 320 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. 380 | min. 310 | min. 13 | min. 125 |
| FORGED | min. 360 | min. 270 | min. 15 | min. 120 |
1. Welding Technologies
Resistance welding electrodes (especially for Class II applications)
Welding tips, holders, and die plates
Spare parts for spot welding and seam welding machines
Electrode rods resistant to thermal fatigue
2. Electrical and Power Systems
High-current carrying conductive rods and busbars
Circuit breaker components and switchgear parts
Durable conductive surfaces for grounding systems
Arc contactors and connection components
3. Automotive and Transportation Industry
Welding electrodes used in automated production lines
Chassis grounding components
Electrically conductive systems exposed to thermal stress
4. Heavy Industry and Production Lines
Mold components in die-casting machines
Metal processing systems operating under high pressure and temperature
Cooling and energy-distribution components in injection die molds
5. Energy and Transformer Manufacturing
Connection and contact components operating at high temperatures
Heat- and current-resistant connector systems
Transformer terminal connections
6. Defense and Aerospace
Electrical contacts operating under harsh environmental conditions
Components requiring heat and impact resistance
Connection elements for radar and signal systems
