C70400 is a specific type of copper alloy, categorized as a copper-nickel-silicon alloy. It is also known as Copper Alloy 704. Here are the key details about C70400 copper strip:

Chemical Composition:

Copper (Cu): Approximately 83.0% - 85.0%

Nickel (Ni): Approximately 4.5% - 6.5%

Silicon (Si): Approximately 4.0% - 5.8%

Iron (Fe): Maximum of 2.0%

Manganese (Mn): Maximum of 2.0%

Zinc (Zn): Maximum of 1.5%

Lead (Pb): Maximum of 0.05%

Phosphorus (P): Maximum of 0.03%

Tin (Sn): Maximum of 0.03%

Aluminum (Al): Maximum of 0.02%

Key Features and Properties:

Corrosion Resistance: C70400 offers excellent corrosion resistance, particularly in seawater and marine environments. It is highly resistant to both general and localized corrosion, including stress corrosion cracking.

High Strength: It has good mechanical strength, which is maintained even at elevated temperatures. This makes C70400 suitable for applications where strength and resistance to thermal expansion are important.

Wear Resistance: The addition of silicon improves the alloy's wear resistance, making it suitable for components subjected to abrasion and erosion, such as pump parts and valve components.

Machinability: C70400 has good machinability despite its alloying elements, allowing it to be easily machined into various shapes and components.

Thermal Conductivity: It retains good thermal conductivity properties, which is beneficial in applications where heat dissipation is necessary.

Applications:

Marine Applications: C70400 is widely used in marine environments for seawater piping systems, heat exchangers, and condensers due to its excellent corrosion resistance and durability.

Oil and Gas Industry: It finds application in offshore oil platforms, where resistance to seawater corrosion and high mechanical strength are critical.

Power Generation: C70400 is used in power plant equipment such as steam turbines, where its resistance to corrosion and thermal stability are advantageous.

Chemical Processing: It is suitable for components in chemical processing equipment, where resistance to corrosive chemicals and high temperatures is required.

Automotive and Aerospace: In some cases, C70400 is used in automotive and aerospace applications where its specific combination of properties meets the requirements for components like bearings, bushings, and valve seats.