Introduction
- C70350 copper-nickel-silicon-cobalt alloy offers excellent mechanical properties, corrosion resistance, and superior cold working characteristics, along with good hot forming capabilities. It is suitable for both cold and hot brazing, as well as gas-shielded arc welding. This alloy is used to manufacture high-strength components that require good forming performance, high stress relaxation resistance, and moderate electrical conductivity, such as contact springs, connectors, and lead frames.
- It has excellent tensile strength, making it suitable for high-load applications.
- With good electrical conductivity, it is ideal for electrical and electronic components.
- Excellent resistance to stress relaxation,allowing the contact force to be maintained at a higher level in elevated temperatures.
- Its performance surpasses that of beryllium copper, but it is much more affordable, making it the preferred alternative to beryllium copper alloys like C17410, C17200…
Chemical Composition
- Ni+Co: 1.0%~2.5%
- Co: 0.9%~2.0%
- Si: 0.5%~1.2%
- Mg: max. 0.04%
- Cu: Remainder
Alloy Standard
Physical Properties
- Density: 8.82 g/cm³
- Electrical conductivility: 45 IACS%(20°C)*(value for the lowest temper class)
- Modulus of elasticity: 120 GPa
- Coefficient of thermal expansion: 17.6 10-6/K
- Thermal conductivity: 200 W/(m*K)
Mechanical Properties
Application
- Electrical Connections: Widely used in connectors and switches (contact springs, connectors, and lead frames).
- Aerospace: Suitable for components that require high strength and corrosion resistance.
- Engineering Applications: Ideal for manufacturing mechanical parts and structural components.
Thermal stress relaxation
- High Stress Relaxation Resistance: The alloy’s unique composition allows it to maintain its mechanical properties, even when subjected to prolonged stress, which is essential for components that require consistent performance over time.
