Polished Cuni 90 10 Flanges, Color : Golden

CuNi 90/10 and CuNi 70/30 flanges are both made from copper and nickel, but in different proportions. CuNi 90/10 contains 90% copper and 10% nickel, while CuNi 70/30 contains 70% copper and 30% nickel. This difference in composition leads to variations in their properties and applications. 

CuNi 90/10 Flanges:

Composition:

90% Copper, 10% Nickel. 

Properties:

High electrical conductivity due to the high copper content, good resistance to stress corrosion cracking (SCC) and biofouling in seawater. 

Applications:

Suitable for applications requiring high electrical conductivity, such as in electrical equipment, and where resistance to corrosion and biofouling is important, like in marine environments. 

Types:

Various types available, including weld neck, slip-on, blind, threaded, etc. 

CuNi 70/30 Flanges:

Composition:

70% Copper, 30% Nickel. 

Properties:

High resistance to stress corrosion cracking (SCC), erosion, and biofouling in seawater and brackish water, good fabricability and weldability. 

Applications:

Commonly used in marine applications, desalination plants, and other environments where resistance to corrosion and erosion is critical. 

Types:

Available in various types, including weld neck, slip-on, blind, threaded, etc. 

Key Differences and Considerations:

Corrosion Resistance:

CuNi 70/30 offers superior corrosion resistance in seawater compared to CuNi 90/10 due to the higher nickel content. 

Electrical Conductivity:

CuNi 90/10 has higher electrical conductivity due to the higher copper content. 

Cost:

CuNi 70/30 may be more expensive due to the higher nickel content. 

Applications:

The choice between CuNi 90/10 and 70/30 flanges depends on the specific application requirements, such as the corrosive environment, electrical conductivity needs, and cost considerations.