C18200, also known as Chromium Copper, is a high-performance copper alloy recognized for its excellent
electrical and thermal conductivity, along with good mechanical properties. This alloy is widely used in
applications where high conductivity and resistance to softening at elevated temperatures are essential.
Chemical Composition
C18200 is primarily composed of the following elements:
| Element |
Percentage (%) |
| Copper (Cu) |
97.5 - 99.1 |
| Chromium (Cr) |
0.5 - 1.2 |
| Others |
≤ 0.5 |
Mechanical Properties
C18200 exhibits excellent mechanical properties suitable for demanding applications:
| Property |
Value |
| Tensile Strength |
345 - 520 MPa |
| Yield Strength |
125 - 450 MPa |
| Elongation |
10 - 25% |
| Hardness (Rockwell B) |
70 - 95 |
| Electrical Conductivity |
80 - 85% IACS (International Annealed Copper Standard) |
| Thermal Conductivity |
190 - 250 W/m·K |
| Density |
8.86 g/cm³ |
Corresponding Country's Brand
C18200 is recognized under different brands in various countries. Here are some equivalents:
| Country |
Brand Name |
| USA |
Chromium Copper |
| UK |
- |
| Germany |
CuCr |
| Japan |
C1820 |
| China |
QCuCr |
Common Questions and Answers
1. What are the primary advantages of using C18200 in electrical applications?
Answer: C18200 offers excellent electrical conductivity, making it suitable for
applications where efficient electrical transfer is crucial, such as in electrical connectors, switches, and
terminals. Its thermal conductivity also aids in heat dissipation.
2. Is C18200 resistant to corrosion?
Answer: While C18200 exhibits good corrosion resistance, especially in atmospheric
environments, it is not as corrosion-resistant as some other copper alloys with higher alloying elements
like nickel or silicon. Proper surface treatments or coatings may be required for more aggressive
environments.
3. Can C18200 be welded or soldered?
Answer: C18200 can be welded and soldered using appropriate techniques suitable for copper
alloys. It is important to use compatible filler materials and ensure proper ventilation during welding to
manage the chromium content effectively.
Summary Table
| Aspect |
Details |
| Chemical Composition |
Cu (97.5-99.1%), Cr (0.5-1.2%), Others (≤ 0.5%) |
| Mechanical Properties |
Tensile Strength: 345-520 MPa, Yield Strength: 125-450 MPa, Elongation: 10-25%, Hardness: 70-95
Rockwell B, Electrical Conductivity: 80-85% IACS, Thermal Conductivity: 190-250 W/m·K,
Density: 8.86 g/cm³
|
| Country Brands |
USA: Chromium Copper, Germany: CuCr, Japan: C1820, China: QCuCr |
| Applications |
Electrical connectors, switches, terminals, heat sinks, applications requiring high electrical
and thermal conductivity
|
C18200 Chromium Copper is a versatile alloy known for its high electrical and thermal conductivity, suitable
for a wide range of electrical applications where efficiency and durability are critical.
