Introduction

• C14415 /C14410 (CuSn0.15) is a low-tin copper alloy primarily composed of copper with 0.15% tin.
  Common temper classes include R360 and R420. It has a higher softening temperature than pure copper and offers excellent creep resistance, stress relaxation, and fatigue performance. This alloy is highly corrosion-resistant and free from stress corrosion cracking. It combines moderate strength and good electrical conductivity with excellent formability. Additionally, it exhibits outstanding performance in hot dip tin, welding, and plating.
• Conductivity: Although the addition of tin slightly reduces conductivity, the tin content is only 0.1%-0.15%, allowing the alloy to maintain conductivity above 80% IACS, making it suitable for electrical applications.
• Corrosion Resistance: The alloy demonstrates excellent corrosion resistance in various environments, especially in moist and corrosive media.
• Strength: Compared to pure copper, CuSn0.15 has higher strength, providing greater stability under load and pressure applications.
• Hardness: The addition of tin increases the alloy’s hardness, allowing it to retain good anti-softening capabilities even at high temperatures.
• Fatigue Resistance: It offers good fatigue resistance, suitable for parts that endure alternating stresses over extended periods.
• Creep and Stress Relaxation: CuSn0.15 alloy shows excellent resistance to creep and stress relaxation under high temperatures and prolonged loads.
• Stress Corrosion Cracking Resistance: This alloy has good resistance to stress corrosion cracking, making it highly suitable for use in stressed environments.
• Welding and Hot Dip Tin: The alloy exhibits good weldability, supporting various welding techniques, including resistance welding, brazing, and laser welding. Additionally, it performs well in hot dip tin, which can be used as a surface coating to enhance corrosion resistance.
• Plating Performance: It is well-suited for electroplating and can undergo various surface treatments to improve durability and appearance in specialized environments.

Chemical Composition

• Sn: 0.1%~0.15%
• Cu: Remainder

Alloy Standard

• ASTM: C14415——ASTM B152
• DIN: CuSn0.15
• EN: CuSn0.15/CW117C
• JIS: C1441

Physical Properties

• Density: 8.93 g/cm³
• Electrical conductivility: 82 IACS%(20°C)*(value for the lowest temper class)
• Modulus of elasticity: 123 GPa
• Coefficient of thermal expansion: 18.0 10^-6/K
• Thermal conductivity: 345 W/(m*K)

Mechanical Properties

Application

• Electronics Industry: Suitable for manufacturing components such as contactors, connectors, terminals, and switches, as well as IC lead frames that require high conductivity and corrosion resistance.
• Automotive Industry: Used for components that need fatigue resistance and creep resistance, such as automotive connectors, radiator tanks, BGA substrate cooling materials, and interconnects.
• High-current connector tabs and central electric units in conventional and electric vehicles
• Male connectors and fuse boxes.