Introduction

• C70260 is a nickel-silicon copper alloy known for its excellent mechanical properties, outstanding electrical conductivity, and corrosion resistance, making it widely used in various industrial applications.
• Cold Working: C70260 alloy exhibits good cold working characteristics, making it suitable for processes such as stamping and bending.
• Heat Treatment: Can be strengthened through aging treatments to enhance overall performance.
• Welding Performance: The alloy has good weldability, allowing for conventional welding processes to create complex-shaped components.
• C70260 demonstrates good corrosion resistance in various environments, particularly in marine and industrial atmospheres, making it suitable for use in harsh working conditions.
• Aging Characteristics:The nickel and silicon in the alloy can form compounds (such as Ni2Si), significantly enhancing the strength and hardness of the alloy during aging, making it suitable for applications that endure long-term stress.
• Corrosion Resistance:C70260 demonstrates good corrosion resistance in various environments, particularly in marine and industrial atmospheres, making it suitable for use in harsh working conditions.

Chemical Composition

• Ni: 1.0%~3.0%
• Si: 0.2%~0.7%
• P: max. 0.7%
• Cu: Remainder

Alloy Standard

• ASTM: C70260——ASTM B422/ASTM B888
• DIN: CuNi2Si/2.0855——CEN/TS 13388
• EN: CuNi2Si/CW111C——CEN/TS 13388
• Aurubis: CuNi2Si0.4 _{is a trademark licensed by Aurubis}

Physical Properties

• Density: 8.86 g/cm³
• Electrical conductivility: 43 IACS%(20°C)*(value for the lowest temper class)
• Modulus of elasticity: 130 GPa
• Coefficient of thermal expansion: 18.0 10^-6/K
• Thermal conductivity: 190 W/(m*K)

Mechanical Properties

Application

• In the high-speed rail industry: essential components include accessories for electrified overhead contact systems, contact line clamps, suspension brackets, fixed pins, and other related hardware.
• Electronics: Widely used in the manufacturing of connectors, switches, springs, and circuit boards, especially in applications requiring high conductivity and corrosion resistance.
• Communication Equipment: Commonly used in critical components of mobile phones, headphone jacks, and communication devices.
• Industrial Applications: Ideal for high-strength, wear-resistant mechanical parts in sectors like automotive and aerospace.

Stress Relaxation Resistance

• Thanks to its superior chemical composition, stable microstructure, and excellent mechanical properties, C70260 alloy exhibits outstanding resistance to stress relaxation. This makes it an ideal material choice for applications that require long-term stress endurance and high reliability.