C19160 Leaded Nickel Copper Strip

Applicable Standard: Primarily ASTM B139/B139M.

• Conductivity: C19160 (K41) high-conductivity copper alloy boasts excellent conductivity, with conductivity reaching over 50% IACS (International Annealed Copper Standard), making it suitable for numerous applications demanding high conductivity.
• Thermal conductivity: The thermal conductivity coefficient is approximately 200~245 W/(m·K), making it suitable for heat dissipation scenarios.
• Mechanical properties: It possesses high strength and hardness, with a tensile strength that can be adjusted through work hardening, ranging from 450 to 600 MPa. The yield strength is no less than 350 MPa, and the elongation is between 10% and 20% (balancing strength and ductility). The hardness is HRB 75 to 90, making it suitable for high-load conditions.
• Corrosion resistance: The addition of nickel forms a dense oxide film, significantly enhancing resistance to seawater, acid rain, and high-temperature oxidation.
• High temperature stability: The working temperature can reach up to 300℃ (400℃ for short-term use). With low attenuation rate of mechanical properties and excellent creep resistance, it is suitable for long-term use in high temperature environments.

• Hot and Cold Processing: C19160 (K41) high-conductivity copper alloy exhibits excellent hot and cold processing properties, with a hot processing temperature range of 750~875℃ and a solution annealing temperature of 700~800℃.
• Cutting performance: Excellent cutting performance, with a relative cutting performance of 80%.
• Connection: Welding and low-temperature brazing through heat treatment are mature processes, but lead in the material can hinder the success of welding. However, soft metal brazing can be easily performed.

• Manufacturing process: It is typically prepared using powder metallurgy. Tungsten powder is compressed and sintered into a porous skeleton, and then copper is infiltrated at high temperatures to obtain a dense composite material. Alternatively, mixed powder compression sintering can also be used.
• Machinability: It is extremely difficult to perform conventional machining (such as turning and milling) on it. The high tungsten content makes it very hard and brittle, and it can usually only be shaped through special machining methods such as grinding (using diamond grinding wheels), electric discharge machining, or wire cutting.
• Welding: It can be welded, but the process is complex, commonly involving electron beam welding or brazing.

• Excellent arc erosion resistance and welding performance: In high-voltage electrical switch contacts, the high temperature generated by the arc can melt and vaporize copper, absorbing a large amount of heat, while the tungsten skeleton maintains its structure without collapsing, thus exhibiting excellent ablation resistance and welding resistance.
• High strength retention rate at high temperatures: Even at temperatures close to the melting point of copper, the tungsten skeleton can still provide effective support with minimal strength reduction.
• Excellent electrical and thermal properties: High electrical conductivity ensures low energy consumption, while high thermal conductivity facilitates heat dissipation.
• Matching thermal expansion coefficient: Similar to commonly used semiconductor and ceramic materials, it is an ideal material for packaging and heat sinks.