C70400 is a specific type of copper alloy known as "Copper Nickel Silicon."

Composition: C70400 is primarily composed of copper (Cu) with significant additions of nickel (Ni) and silicon (Si). The typical composition ranges are approximately 91% Cu, 5% Ni, and 4% Si. This composition gives it specific mechanical and physical properties suitable for various applications.

Properties:

Mechanical Properties: C70400 offers good strength and hardness, making it suitable for applications where mechanical properties are important.

Corrosion Resistance: It provides excellent corrosion resistance, particularly in seawater and other aggressive environments. This property is due to the alloy's high nickel content, which enhances its resistance to corrosion.

Machinability: C70400 has good machinability, allowing it to be easily machined into various components.

Thermal Conductivity: The alloy exhibits good thermal conductivity, which is beneficial in applications where heat dissipation is important.

Standards: C70400 is typically specified according to ASTM (American Society for Testing and Materials) standards, such as ASTM B171 for copper alloy plate, sheet, strip, and rolled bar.

C70400 is a copper alloy known as Copper Nickel Silicon, and its chemical composition typically includes the following elements in approximate percentages:

Copper (Cu): Approximately 88.0% to 91.0%

Nickel (Ni): Approximately 4.0% to 6.0%

Silicon (Si): Approximately 3.0% to 5.0%

Iron (Fe): Maximum of 1.0%

Manganese (Mn): Maximum of 1.0%

Lead (Pb): Maximum of 0.05%

Phosphorus (P): Maximum of 0.05%

Zinc (Zn): Maximum of 1.0%

Other Elements: Trace amounts of other elements such as aluminum (Al), tin (Sn), and sulfur (S) may be present in small quantities.

Key points about the chemical composition:

Copper (Cu): This is the main component of C70400, providing the base material for the alloy. Copper contributes to its excellent electrical and thermal conductivity.

Nickel (Ni): Nickel is added to enhance corrosion resistance, particularly in marine environments. It also improves the alloy's strength and toughness.

Silicon (Si): Silicon contributes to the alloy's strength and helps control grain size, which can affect mechanical properties and machinability.

Iron (Fe), Manganese (Mn), Lead (Pb), Phosphorus (P), and Zinc (Zn): These elements are present in controlled amounts to improve specific properties such as machinability, corrosion resistance, and mechanical strength.

Features  

C70400 copper bar, also known as Copper Nickel Silicon alloy, possesses several notable features that make it a highly desirable material for various applications:

Composition: C70400 is primarily composed of copper (Cu) with significant additions of nickel (Ni) and silicon (Si). The typical composition ranges are approximately 91% Cu, 5% Ni, and 4% Si. This composition gives it specific mechanical and physical properties suitable for demanding environments.

Corrosion Resistance: One of the standout features of C70400 is its excellent corrosion resistance, particularly in seawater and marine environments. The addition of nickel enhances its resistance to corrosion from both freshwater and saltwater, making it ideal for marine applications such as seawater piping systems, heat exchangers, and marine hardware.

Mechanical Properties: C70400 offers good strength and hardness, which are crucial for structural integrity and load-bearing applications. It exhibits high tensile strength and can withstand mechanical stress and strain, making it suitable for components subjected to high loads.

Machinability: Despite its alloying elements, C70400 maintains good machinability. It can be easily machined, drilled, and shaped into various complex components, which is beneficial for manufacturing processes where precision is required.

Thermal Conductivity: The alloy has good thermal conductivity, allowing efficient heat transfer and dissipation. This property is advantageous in applications where thermal management is critical, such as heat exchangers and electronic components.

Electrical Conductivity: C70400 retains good electrical conductivity, making it suitable for electrical connectors, terminals, and other applications where electrical conductivity is important.

Weldability: C70400 exhibits good weldability, allowing it to be joined using common welding techniques without significant loss of mechanical properties.

Applications:

1. Marine: Commonly used in marine environments for seawater piping systems, heat exchangers, condensers, and marine hardware.

2. Industrial: Used in chemical processing, desalination plants, oil and gas industries for valves, pumps, fittings, and heat exchangers.

3. Electronics: Utilized in electrical connectors, terminals, and heat sinks due to its thermal and electrical conductivity.

4. Aerospace and Defense: Its corrosion resistance, strength, and reliability make it suitable for aerospace and defense applications in harsh environments.

Applications:

Marine Applications: C70400 is commonly used in marine environments for components such as seawater piping systems, heat exchangers, condensers, and marine hardware due to its excellent corrosion resistance.

Industrial Uses: It finds applications in industrial sectors such as chemical processing, oil and gas, and desalination plants for valves, pumps, fittings, and other equipment exposed to corrosive environments.

Electrical and Electronic Components: Due to its thermal and electrical conductivity, C70400 is used in electrical connectors, terminals, and heat sinks.

Aerospace and Defense: The alloy's properties make it suitable for aerospace and defense applications where resistance to corrosion, strength, and reliability in harsh environments are critical.